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Protein Structures and Oligomeric States

Enter a protein name, UniProt accession or PDB ID. Name searches ask you to confirm the protein identity before related structures are queried.

Current Protein Identity：Q07955 New Search
10PDB entries
11Biological assembly
11chain/assembly records
Main Difference Dimensions in This Set
Different construct Different mutation/modification Different assembly state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics

Difference tags compare only the current result set; every original PDB and assembly record remains separate.

Related-Structure Differences

Each row represents one biological assembly in one PDB entry; multiple monomers of the same protein are listed separately.

PDB Entry Assembly / Oligomeric State Construct Mutations and Modifications Ligands, Ions and Non-polymers Experimental Method Experimental Conditions Structure Quality
1X4A Solution structure of RRM domain in splicing factor SF2 Deposited 2005-05-14 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 33–128（96 aa） Fragment：RRM domain
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 7；298 K；Ionic strength (raw mmCIF value) 120mM；Pressure ambient
NMR sample composition 0.8mM U-15,13C; 20mM phosphate buffer NA; 100mM NaCl; 1mM d-DTT; 0.02% NaN3 | 90% H2O/10% D2O
Resolution not provided
2M7S NMR structure of RNA recognition motif 2 (RRM2) of Homo sapiens splicing factor, arginine/serine-rich 1 Deposited 2013-04-29 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 106–195（90 aa） Fragment：UNP residues 106-195
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 6；298 K；Ionic strength (raw mmCIF value) 0.0798；Pressure ambient
NMR sample composition 1.2 mM [U-99% 13C; U-99% 15N] protein, 20 mM sodium phosphate, 50 mM sodium chloride, 5 mM sodium azide, 90% H2O/10% D2O | 90% H2O/10% D2O
Resolution not provided
2M8D Structure of SRSF1 RRM2 in complex with the RNA 5'-UGAAGGAC-3' Deposited 2013-05-17 Assembly 1 Protein–RNA Monomer；Protein × 1 PDB declaration: dimeric（2） Consistent with all polymers
Chain B 107–196（90 aa）
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 5.5；313 K；Ionic strength (raw mmCIF value) 120；Pressure ambient
NMR sample composition 0.8 mM [U-100% 15N] RNA, 0.8 mM [U-100% 13C; U-100% 15N] protein, 90% H2O/10% D2O | 90% H2O/10% D2O
Resolution not provided
2O3D Structure of human SF2/ASF RNA recognition motif 2 (RRM2) Deposited 2006-12-01 Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric（1） Consistent with protein count
Chain A 106–214（109 aa） Fragment：RNA Recognition motif 2 of SF2/ASF
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 6；303 K；Ionic strength (raw mmCIF value) 20mM phosphate, 50mM NaCl, 50mM L-Arg, 50mM L-Glu；Pressure ambient
NMR sample composition 1mM SF2/ASF RRM2 U-15N,13C; 20mM phophate buffer Na; 50mM L-Arg; 50mM L-Glu; 5mM EDTA; 1mM DTT; 90% H2O, 10% D2O | 90% H2O/10% D2O
Resolution not provided
3BEG Crystal structure of SR protein kinase 1 complexed to its substrate ASF/SF2 Deposited 2007-11-18 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain B 105–219（115 aa） Fragment：UNP residues 105-219
Not recorded SEP PHOSPHOSERINE × 1 ALA ALANINE × 1 ANP PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 5.6；291 K；0.1M sodium citrate, 0.2M sodium acetate, 5% ethanol, 15% PEGMME 5000, pH 5.6, VAPOR DIFFUSION, HANGING DROP, temperature 291K
Resolution 2.90 Å R-free 0.298
4C0O Transportin 3 in complex with phosphorylated ASF/SF2 Deposited 2013-08-06 Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain C 106–230（125 aa） Fragment：RESIDUES 106-230 (SECOND RRM DOMAIN AND RS DOMAIN)
Non-standard monomer：Yes (specific site not provided by mmCIF) No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions pH 6；16% (W/V) PEG3350, 0.1 M KSCN, 0.1 M BIS-TRIS PROPANE, PH6.0
Resolution 2.56 Å R-free 0.269
4C0O Transportin 3 in complex with phosphorylated ASF/SF2 Deposited 2013-08-06 Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric（2） Consistent with protein count
Chain D 106–230（125 aa） Fragment：RESIDUES 106-230 (SECOND RRM DOMAIN AND RS DOMAIN)
Non-standard monomer：Yes (specific site not provided by mmCIF) K POTASSIUM ION × 1 X-RAY DIFFRACTION
X-ray crystallization conditions pH 6；16% (W/V) PEG3350, 0.1 M KSCN, 0.1 M BIS-TRIS PROPANE, PH6.0
Resolution 2.56 Å R-free 0.269
6HPJ Structure of human SRSF1 RRM1 bound to AACAAA RNA Deposited 2018-09-21 Assembly 1 Insufficient information Monomer；Protein × 1 PDB declaration: dimeric（2） Consistent with all polymers
Chain B 1–97（97 aa）
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 7；313 K；Ionic strength (raw mmCIF value) 120；Pressure atmospheric
NMR sample composition 0.5 mM [U-99% 15N] SRSF1 RRM1, 0.5 mM RNA (5'-R(*AP*AP*CP*AP*AP*A)-3'), 100% D2O | 100% D2O
NMR sample composition 0.5 mM [U-99% 15N] SRSF1 RRM1, 0.5 mM NA RNA (5'-R(*AP*AP*CP*AP*AP*A)-3'), 90% H2O/10% D2O | 90% H2O/10% D2O
NMR sample composition 0.5 mM [U-99% 13C; U-99% 15N] SRSF1 RRM1, 0.5 mM NA RNA (5'-R(*AP*AP*CP*AP*AP*A)-3'), 90% H2O/10% D2O | 90% H2O/10% D2O
Resolution not provided
7ABG Human pre-Bact-1 spliceosome Deposited 2020-09-07 Assembly 1 Protein–RNA Heteromer；Protein × 54 PDB declaration: 58-meric（58） Consistent with all polymers
Chain A6 1–248（248 aa）
Not recorded IHP INOSITOL HEXAKISPHOSPHATE × 1 GTP GUANOSINE-5'-TRIPHOSPHATE × 1 MG MAGNESIUM ION × 1 GTG 7-METHYL-GUANOSINE-5'-TRIPHOSPHATE-5'-GUANOSINE × 1 ELECTRON MICROSCOPY
cryo-EM buffer pH 7.9
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 7.80 Å
8QO9 Cryo-EM structure of a human spliceosomal B complex protomer Deposited 2023-09-28 Assembly 1 Protein–RNA Heteromer；Protein × 66 PDB declaration: 71-meric（71） Consistent with all polymers
Chain z 1–248（248 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.9
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 5.29 Å
9R8V Cryo-EM structure of the human pre-Bact-OTS complex (whole map) Deposited 2025-05-17 Assembly 1 Protein–RNA Heteromer；Protein × 59 PDB declaration: 63-meric（63） Consistent with all polymers
Chain A6 1–248（248 aa）
Not recorded No recorded non-water small molecule ELECTRON MICROSCOPY
cryo-EM buffer pH 7.9
cryo-EM vitrification conditions Cryogen ETHANE
Resolution 8.50 Å

This page presents structural evidence recorded in PDB/mmCIF.“No recorded non-water small molecule” does not prove that the experimental sample was ligand-free; experimental conditions belong to the PDB experiment, while ligands and copy counts are shown for each biological assembly.