2sar

DETERMINATION AND RESTRAINED LEAST-SQUARES REFINEMENT OF THE CRYSTAL STRUCTURES OF RIBONUCLEASE SA AND ITS COMPLEX WITH 3'-GUANYLIC ACID AT 1.8 ANGSTROMS RESOLUTION

Method: X-RAY DIFFRACTION D_max: 71.6 Å Quality: GOOD

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1. Protein Identity and Related Structures Protein Identity & Related Structures

RIBONUCLEASE SA

Streptomyces aureofaciens

State in the Current Structure

Assembly	Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Associated Components	Method and Experimental Conditions	Structure Quality
1	Protein monomer Monomer Protein × 1 PDB declaration: monomeric（1） Consistent with protein copy count	Chain A； UniProt 1–96	Not recorded	SO4 SULFATE ION × 1 3GP GUANOSINE-3'-MONOPHOSPHATE × 1	X-RAY DIFFRACTION mmCIF provides none of the parsed experimental conditions	Resolution 1.80 Å
2	Protein monomer Monomer Protein × 1 PDB declaration: monomeric（1） Consistent with protein copy count	Chain B； UniProt 1–96	Not recorded	SO4 SULFATE ION × 1	X-RAY DIFFRACTION mmCIF provides none of the parsed experimental conditions	Resolution 1.80 Å

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

Other PDB	Difference from Current Entry 2SAR	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
1AY7 RIBONUCLEASE SA COMPLEX WITH BARSTAR Deposited 1997-11-14	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 1–96（96 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions pH 7；pH 7.0	Resolution 1.70 Å R-free 0.190
1BOX N39S MUTANT OF RNASE SA FROM STREPTOMYCES AUREOFACIENS Deposited 1998-08-07	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–96（96 aa）	Mutation：N39S	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions pH 8；HANGING DROP VAPOUR EQUILIBRATION DROP: 10 MG/ML OF PROTEIN 0.1 M TRIS-HCL BUFFER AT PH 8.0 12,5 % PEG 6000 RESERVOIR: 25 % PEG 6000	Resolution 1.60 Å R-free 0.218
1C54 SOLUTION STRUCTURE OF RIBONUCLEASE SA Deposited 1999-10-22	Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–96（96 aa）	Not recorded	No recorded non-water small molecule	SOLUTION NMR NMR measurement conditions pH 5.5；303.2 K；Ionic strength (raw mmCIF value) 0；Pressure AMBIENT NMR measurement conditions pH 5.5；303.2 K；Ionic strength (raw mmCIF value) 0；Pressure AMBIENT NMR measurement conditions pH 5.5；303.2 K；Ionic strength (raw mmCIF value) 0；Pressure AMBIENT NMR measurement conditions pH 5.5；303.2 K；Ionic strength (raw mmCIF value) 0；Pressure AMBIENT NMR sample composition NA NMR sample composition NA NMR sample composition U-15N NMR sample composition U-15N	Resolution not provided
1GMP COMPLEX OF RIBONUCLEASE FROM STREPTOMYCES AUREOFACIENS WITH 2'-GMP AT 1.7 ANGSTROMS RESOLUTION Deposited 1992-10-01	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–96（96 aa） Chain B 1–96（96 aa）	Not recorded	SO4 SULFATE ION × 1 2GP GUANOSINE-2'-MONOPHOSPHATE × 2	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 1.70 Å
1GMQ COMPLEX OF RIBONUCLEASE FROM STREPTOMYCES AUREOFACIENS WITH 2'-GMP AT 1.7 ANGSTROMS RESOLUTION Deposited 1992-10-01	Parsed fields agree	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–96（96 aa）	Not recorded	SO4 SULFATE ION × 1	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 1.80 Å
1GMQ COMPLEX OF RIBONUCLEASE FROM STREPTOMYCES AUREOFACIENS WITH 2'-GMP AT 1.7 ANGSTROMS RESOLUTION Deposited 1992-10-01	Different ligand/ion	Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain B 1–96（96 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 1.80 Å
1GMR COMPLEX OF RIBONUCLEASE FROM STREPTOMYCES AUREOFACIENS WITH 2'-GMP AT 1.7 ANGSTROMS RESOLUTION Deposited 1992-10-01	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–96（96 aa） Chain B 1–96（96 aa）	Not recorded	SO4 SULFATE ION × 1 2GP GUANOSINE-2'-MONOPHOSPHATE × 2	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 1.77 Å
1I70 CRYSTAL STRUCTURE OF RNASE SA Y86F MUTANT Deposited 2001-03-07	Different mutation/modification Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–96（96 aa）	Mutation：Y86F	SO4 SULFATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；293 K；AMMONIUM SULFATE, MONOSODIUM PHOSPHATE, DISODIUM PHOSPHATE, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 1.70 Å R-free 0.178
1I70 CRYSTAL STRUCTURE OF RNASE SA Y86F MUTANT Deposited 2001-03-07	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain B 1–96（96 aa）	Mutation：Y86F	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；293 K；AMMONIUM SULFATE, MONOSODIUM PHOSPHATE, DISODIUM PHOSPHATE, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 1.70 Å R-free 0.178
1I8V CRYSTAL STRUCTURE OF RNASE SA Y80F MUTANT Deposited 2001-03-16	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–96（96 aa）	Mutation：Y80F	SO4 SULFATE ION × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；293 K；AMMONIUM SULFATE, MONOSODIUM PHOSPHATE, DISODIUM PHOSPHATE, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 293.0K	Resolution 1.25 Å R-free 0.156
1I8V CRYSTAL STRUCTURE OF RNASE SA Y80F MUTANT Deposited 2001-03-16	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain B 1–96（96 aa）	Mutation：Y80F	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；293 K；AMMONIUM SULFATE, MONOSODIUM PHOSPHATE, DISODIUM PHOSPHATE, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 293.0K	Resolution 1.25 Å R-free 0.156
1LNI CRYSTAL STRUCTURE ANALYSIS OF A RIBONUCLEASE FROM STREPTOMYCES AUREOFACIENS AT ATOMIC RESOLUTION (1.0 A) Deposited 2002-05-03	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–96（96 aa）	Not recorded	SO4 SULFATE ION × 1 GOL GLYCEROL × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.2；298 K；ammonium sulfate, pH 7.2, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 1.00 Å
1LNI CRYSTAL STRUCTURE ANALYSIS OF A RIBONUCLEASE FROM STREPTOMYCES AUREOFACIENS AT ATOMIC RESOLUTION (1.0 A) Deposited 2002-05-03	Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain B 1–96（96 aa）	Not recorded	GOL GLYCEROL × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.2；298 K；ammonium sulfate, pH 7.2, VAPOR DIFFUSION, HANGING DROP, temperature 298K	Resolution 1.00 Å
1RGE HYDROLASE, GUANYLORIBONUCLEASE Deposited 1995-06-05	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–96（96 aa） Chain B 1–96（96 aa）	Not recorded	SO4 SULFATE ION × 1 2GP GUANOSINE-2'-MONOPHOSPHATE × 1	X-RAY DIFFRACTION X-ray crystallization conditions pH 6.7；ROOM TEMPERATURE, PH 6.7, AMMONIUM SULFATE	Resolution 1.15 Å
1RGF HYDROLASE, GUANYLORIBONUCLEASE Deposited 1995-06-05	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–96（96 aa） Chain B 1–96（96 aa）	Not recorded	SO4 SULFATE ION × 2	X-RAY DIFFRACTION X-ray crystallization conditions pH 6.7；ROOM TEMPERATURE, PH 6.7, AMMONIUM SULFATE	Resolution 1.20 Å
1RGG HYDROLASE, GUANYLORIBONUCLEASE Deposited 1995-06-05	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–96（96 aa） Chain B 1–96（96 aa）	Not recorded	SO4 SULFATE ION × 2	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 1.20 Å
1RGH HYDROLASE, GUANYLORIBONUCLEASE Deposited 1995-06-05	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–96（96 aa） Chain B 1–96（96 aa）	Not recorded	SO4 SULFATE ION × 2	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 1.20 Å
1RSN RIBONUCLEASE (RNASE SA) (E.C.3.1.4.8) COMPLEXED WITH EXO-2',3'-CYCLOPHOSPHOROTHIOATE Deposited 1995-09-01	Different ligand/ion Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–96（96 aa）	Not recorded	SO4 SULFATE ION × 1 SGP GUANOSINE-2',3'-CYCLOPHOSPHOROTHIOATE × 1	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 2.00 Å
1RSN RIBONUCLEASE (RNASE SA) (E.C.3.1.4.8) COMPLEXED WITH EXO-2',3'-CYCLOPHOSPHOROTHIOATE Deposited 1995-09-01	Different ligand/ion Different structure-quality metrics	Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain B 1–96（96 aa）	Not recorded	SGP GUANOSINE-2',3'-CYCLOPHOSPHOROTHIOATE × 1	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 2.00 Å
1SAR DETERMINATION AND RESTRAINED LEAST-SQUARES REFINEMENT OF THE CRYSTAL STRUCTURES OF RIBONUCLEASE SA AND ITS COMPLEX WITH 3'-GUANYLIC ACID AT 1.8 ANGSTROMS RESOLUTION Deposited 1990-12-13	Parsed fields agree	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–96（96 aa）	Not recorded	SO4 SULFATE ION × 1	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 1.80 Å
1SAR DETERMINATION AND RESTRAINED LEAST-SQUARES REFINEMENT OF THE CRYSTAL STRUCTURES OF RIBONUCLEASE SA AND ITS COMPLEX WITH 3'-GUANYLIC ACID AT 1.8 ANGSTROMS RESOLUTION Deposited 1990-12-13	Different ligand/ion	Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain B 1–96（96 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 1.80 Å
1T2H Y81W mutant of RNase Sa from Streptomyces aureofaciens Deposited 2004-04-21	Different mutation/modification Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–96（96 aa）	Mutation：Y81W	SO4 SULFATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.4；295 K；ammonium sulfate, disodium phosphate, monosodium phosphate, pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 295K	Resolution 1.00 Å R-free 0.166
1T2H Y81W mutant of RNase Sa from Streptomyces aureofaciens Deposited 2004-04-21	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain B 1–96（96 aa）	Mutation：Y81W	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.4；295 K；ammonium sulfate, disodium phosphate, monosodium phosphate, pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 295K	Resolution 1.00 Å R-free 0.166
1T2I T76W mutant of RNase Sa from Streptomyces aureofaciens Deposited 2004-04-21	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–96（96 aa）	Mutation：T76W	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.2；293 K；ammonium sulfate, disodium phosphate, monosodium phosphate, pH 7.2, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 1.10 Å R-free 0.167
1UCI Mutants of RNase Sa Deposited 2003-04-15	Different mutation/modification Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–96（96 aa）	Mutation：V2T	SO4 SULFATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；293 K；1.6M ammonium sulfate, 0.1M MES pH 6.5, 10%(v/v) dioxane, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 1.80 Å R-free 0.208
1UCI Mutants of RNase Sa Deposited 2003-04-15	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain B 1–96（96 aa）	Mutation：V2T	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；293 K；1.6M ammonium sulfate, 0.1M MES pH 6.5, 10%(v/v) dioxane, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 1.80 Å R-free 0.208
1UCJ Mutants of RNase Sa Deposited 2003-04-15	Different mutation/modification Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–96（96 aa）	Mutation：V36T	SO4 SULFATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；293 K；1.6M ammonium sulfate, 0.1M MES pH 6.5, 10%(v/v) dioxane, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 1.81 Å R-free 0.227
1UCJ Mutants of RNase Sa Deposited 2003-04-15	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain B 1–96（96 aa）	Mutation：V36T	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；293 K；1.6M ammonium sulfate, 0.1M MES pH 6.5, 10%(v/v) dioxane, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 1.81 Å R-free 0.227
1UCK Mutants of RNase Sa Deposited 2003-04-15	Different mutation/modification Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–96（96 aa）	Mutation：V43T	SO4 SULFATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；293 K；1.6M ammonium sulfate, 0.1M MES pH 6.5, 10%(v/v) dioxane, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 1.80 Å R-free 0.214
1UCK Mutants of RNase Sa Deposited 2003-04-15	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain B 1–96（96 aa）	Mutation：V43T	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；293 K；1.6M ammonium sulfate, 0.1M MES pH 6.5, 10%(v/v) dioxane, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 1.80 Å R-free 0.214
1UCL Mutants of RNase Sa Deposited 2003-04-15	Different mutation/modification Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–96（96 aa）	Mutation：V57T	SO4 SULFATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.4；293 K；2.0M ammonium sulfate, 0.1M HEPES-Na pH 7.5, 2%(v/v) PEG400, pH 8.4, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 1.82 Å R-free 0.218
1UCL Mutants of RNase Sa Deposited 2003-04-15	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain B 1–96（96 aa）	Mutation：V57T	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 8.4；293 K；2.0M ammonium sulfate, 0.1M HEPES-Na pH 7.5, 2%(v/v) PEG400, pH 8.4, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 1.82 Å R-free 0.218
1YNV Asp79 makes a large, unfavorable contribution to the stability of RNase Sa Deposited 2005-01-25	Different mutation/modification Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain X 1–96（96 aa）	Mutation：Q94K	SO4 SULFATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions EVAPORATION；pH 10.5；291 K；1.2 M NaH2PO4/0.8M K2HPO4, 0.1 M CAPS, pH 10.5 and 0.2 M Li2SO4., EVAPORATION, temperature 291K	Resolution 1.20 Å R-free 0.178
1ZGX Crystal structure of ribonuclease mutant Deposited 2005-04-22	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–63（63 aa） Fragment：residues 1-63 Chain B 64–96（33 aa） Fragment：residues 64-96	Mutation：Q94K	SO4 SULFATE ION × 3	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.4；293 K；ammonium sulfate, Hepes, pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 1.13 Å R-free 0.164
3A5E Crystal structure of 5K RNase Sa Deposited 2009-08-06	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–96（96 aa）	Mutation：D1K, D17K, D25K, E41K, E74K	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 4.5；293 K；30% PEG4000, 200mM NaAcetate, 100mM Tris pH8.5, pH4.5, VAPOR DIFFUSION, SITTING DROP, temperature 293K	Resolution 1.60 Å R-free 0.281
4GHO Crystal Structure Analysis of Streptomyces aureofaciens Ribonuclease S24A mutant Deposited 2012-08-08	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–96（96 aa） Chain B 1–96（96 aa）	Mutation：S24A Mutation：S24A	SO4 SULFATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.2；298 K；0.7M ammonium sulfate, phosphate buffer, pH 7.2, VAPOR DIFFUSION, HANGING DROP, temperature 298, temperature 298.0K	Resolution 1.10 Å R-free 0.117
4J5G Crystal structure analysis of Streptomyces aureofaciens ribonuclease Sa T95A mutant Deposited 2013-02-08	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–96（96 aa）	Mutation：T95A	SO4 SULFATE ION × 3	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.2；293 K；ammonium sulfate 0.8 M, cacodylate buffer 0.1M , pH 7.2, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 1.31 Å R-free 0.150
4J5G Crystal structure analysis of Streptomyces aureofaciens ribonuclease Sa T95A mutant Deposited 2013-02-08	Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain B 1–96（96 aa）	Mutation：T95A	GOL GLYCEROL × 1 CAC CACODYLATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.2；293 K；ammonium sulfate 0.8 M, cacodylate buffer 0.1M , pH 7.2, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 1.31 Å R-free 0.150
4J5G Crystal structure analysis of Streptomyces aureofaciens ribonuclease Sa T95A mutant Deposited 2013-02-08	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 3 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–96（96 aa） Chain B 1–96（96 aa）	Mutation：T95A Mutation：T95A	SO4 SULFATE ION × 3 GOL GLYCEROL × 1 CAC CACODYLATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.2；293 K；ammonium sulfate 0.8 M, cacodylate buffer 0.1M , pH 7.2, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 1.31 Å R-free 0.150
4J5K Crystal structure analysis of Streptomyces aureofaciens ribonuclease Sa Y51F mutant Deposited 2013-02-08	Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 1–96（96 aa） Fragment：Ribonuclease Sa	Mutation：Y51F	SO4 SULFATE ION × 1 GOL GLYCEROL × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.4；293 K；Ammonium sulfate 0.9 M, phosphate buffer 0.1 M , pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 1.23 Å R-free 0.136
4J5K Crystal structure analysis of Streptomyces aureofaciens ribonuclease Sa Y51F mutant Deposited 2013-02-08	Different construct Different mutation/modification Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain B 1–96（96 aa） Fragment：Ribonuclease Sa	Mutation：Y51F	GOL GLYCEROL × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.4；293 K；Ammonium sulfate 0.9 M, phosphate buffer 0.1 M , pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 1.23 Å R-free 0.136
4J5K Crystal structure analysis of Streptomyces aureofaciens ribonuclease Sa Y51F mutant Deposited 2013-02-08	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 3 Protein homooligomer Homooligomer；Protein × 2 PDB declaration: dimeric	Chain A 1–96（96 aa） Fragment：Ribonuclease Sa Chain B 1–96（96 aa） Fragment：Ribonuclease Sa	Mutation：Y51F Mutation：Y51F	SO4 SULFATE ION × 1 GOL GLYCEROL × 2	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.4；293 K；Ammonium sulfate 0.9 M, phosphate buffer 0.1 M , pH 7.4, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 1.23 Å R-free 0.136

27 other PDB entries and 42 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	RNSA_STRAU
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–96； UniProt 1–96 Author chain B； PDBConstruct 1–96； UniProt 1–96

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

SAXS scattering curve SAXS Profile

P(r) Distance Distribution P(r) Distribution

Download Download SAXS (.dat) P(r) (.pr.out) CIF

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	2sar
Deposition date deposition_date	1990-12-13
Structure title title	DETERMINATION AND RESTRAINED LEAST-SQUARES REFINEMENT OF THE CRYSTAL STRUCTURES OF RIBONUCLEASE SA AND ITS COMPLEX WITH 3'-GUANYLIC ACID AT 1.8 ANGSTROMS RESOLUTION
Keywords keywords	HYDROLASE (ENDORIBONUCLEASE); HYDROLASE (ENDORIBONUCLEASE)
Experimental Method method	X-RAY DIFFRACTION

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3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier	21.37 Å
Radius of gyration Rg (electron density) rg_electron	20.90 Å
Forward intensity I(0) i0	9656370.00
Molecular weight molecular_weight	21696.0 kDa
Excluded volume excluded_volume	26473 Å³
Envelope volume envelope_volume	32889 Å³
Hydration-shell volume shell_volume	14410 Å³
Envelope diameter envelope_diameter	70.8 Å
Shell Rg shell_rg	25.24 Å
Envelope Rg envelope_rg	20.98 Å
Shape Rg shape_rg	20.86 Å
Total Rg total_rg	21.64 Å
Total atoms total_atoms	1524
Residues n_residues	192
Spherical-harmonic order n_harmonics	20
q range q_range	— – 0.5000 Å⁻¹
Data points n_points	101
Shell type shell_type	directional
Solvent electron density solvent_density	0.3340 e/Å³
Shell contrast contrast_shell	0.0300 e/Å³
CRYSOL version crysol_version	4.1.3

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4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax	71.6 Å
Rg (real space) rg_real	21.56 Å
Rg uncertainty (real space) rg_real_error	0.64 Å
I(0) (real space) i0_real	9.6560e+06
I(0) uncertainty (real space) i0_real_error	1.2630e+05
Rg (reciprocal space) rg_reciprocal	21.53 Å
I(0) (reciprocal space) i0_reciprocal	9656000.0000
Solution quality estimate total_estimate	0.8241
Solution quality rating solution_quality	GOOD a GOOD solution
P(r) peaks n_peaks	2
Primary peak position r_peak_primary	19.0 Å
Skewness Skewness skewness	0.471
Kurtosis Kurtosis kurtosis	-0.521
Angular range angular_range	— – 0.3700 Å⁻¹
Current regularization parameter α current_alpha	0.0000
Highest regularization parameter α highest_alpha	3222000.0000
Real-space data points n_real_points	69
GNOM version gnom_version	4.1.3
Quality Criteria quality_criteria	AN1: 0.000; Oscil: 0.678; Stabil: 0.998; Sysdev: 1.000; Positv: 1.000; Valcen: 0.699; Smooth: 0.981

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5. Crystallography and Experiment 5. Crystallography & Experiment

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6. Entities and Polymers Entities & Polymers (4)

Entity 1 Entity 1 polymer

Description description	RIBONUCLEASE SA
Molecular weight formula_weight	10584.5 kDa
EC 编号 ec_number	3.1.4.8
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	1748

DVSGTVCLSALPPEATDTLNLIASDGPFPYSQDGVVFQNRESVLPTQSYGYYHEYTVITPGARTRGTRRIICGEATQEDYYTGDHYATFSLIDQTC

来源 Source

来源生物 organism	Streptomyces aureofaciens
NCBI Class编号 ncbi_taxonomy_id	1894

Entity 2 Entity 2 non-polymer

Description description	SULFATE ION
Molecular weight formula_weight	96.1 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 3 Entity 3 non-polymer

Description description	GUANOSINE-3'-MONOPHOSPHATE
Molecular weight formula_weight	363.2 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	222

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7. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d2sara_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.1 — Microbial ribonucleases
Superfamily Superfamily superfamily	d.1.1 — Microbial ribonucleases
Family Family family	d.1.1.2 — Bacterial ribonucleases

Domain ID domain_id	d2sarb_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.1 — Microbial ribonucleases
Superfamily Superfamily superfamily	d.1.1 — Microbial ribonucleases
Family Family family	d.1.1.2 — Bacterial ribonucleases

CATH v4.4 (2 domains)

Domain ID domain_id	2sarA00
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	450 — Nuclear Transport Factor 2; Chain: A,
Homologous superfamily homologous superfamily	30 — Microbial ribonucleases

Domain ID domain_id	2sarB00
Class class	3 — Alpha Beta
Architecture architecture	10 — Roll
Topology topology	450 — Nuclear Transport Factor 2; Chain: A,
Homologous superfamily homologous superfamily	30 — Microbial ribonucleases

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8. Citations (1)

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Unit-cell length a length_a	64.900 Å
Unit-cell length b length_b	78.320 Å
Unit-cell length c length_c	38.790 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	1.800 Å
Low-resolution limit resolution_low	— Å
R factor r_factor	0.1750
R_work r_work	—
R_free r_free	—

fit	/app/data/saxs_computation/sa/2sar/2sar.fit
pddf	/app/data/pr_computation/sa/2sar/2sar.pr.out
profile	/app/data/saxs_computation/sa/2sar/2sar.dat