SAXSdb — 1b9k

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

PROTEIN (ALPHA-ADAPTIN APPENDAGE DOMAIN)

Mus musculus

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 701–938	Fragment：APPENDAGE DOMAIN	No other associated polymer	X-RAY DIFFRACTION X-ray crystallization conditions：pH 6；20% PEG 4000, 10% ISOPROPANOL, 100MM NA CITRATE PH 6.0, 10MM DTT, 6MG/ML PROTEIN	Resolution 1.90 Å R-free 0.221

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 1B9K	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
1KY6 AP-2 CLATHRIN ADAPTOR ALPHA-APPENDAGE IN COMPLEX WITH EPSIN DPW PEPTIDE Deposited 2002-02-03	Different construct 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 701–938（238 aa） Fragment：C-TERMINAL APPENDAGE (EAR) RESIDUES 701-938	Not recorded	SO4 SULFATE ION × 1	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 2.00 Å R-free 0.245
1KY7 THE AP-2 CLATHRIN ADAPTOR ALPHA-APPENDAGE IN COMPLEX WITH AMPHIPHYSIN FXDXF Deposited 2002-02-03	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 701–938（238 aa） Fragment：C-TERMINAL APPENDAGE (EAR) RESIDUES 701-938	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 2.15 Å R-free 0.252
1KYD AP-2 CLATHRIN ADAPTOR ALPHA-APPENDAGE IN COMPLEX WITH EPSIN DPW PEPTIDE Deposited 2002-02-04	Different construct 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 701–938（238 aa） Fragment：C-TERMINAL APPENDAGE (EAR), RESIDUES 701-938	Not recorded	SO4 SULFATE ION × 1	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 2.00 Å R-free 0.228
1KYF AP-2 CLATHRIN ADAPTOR ALPHA-APPENDAGE IN COMPLEX WITH EPS15 DPF PEPTIDE Deposited 2002-02-04	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 701–938（238 aa） Fragment：C-TERMINAL APPENDAGE (EAR) RESIDUES 701-938	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 1.22 Å R-free 0.211
1KYU AP-2 CLATHRIN ADAPTOR ALPHA-APPENDAGE IN COMPLEX WITH EPS15 DPF PEPTIDE Deposited 2002-02-05	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 701–938（238 aa） Fragment：C-TERMINAL APPENDAGE (EAR) RESIDUES 701-938	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION mmCIF provides none of the parsed conditions	Resolution 1.80 Å R-free 0.223
1QTP CRYSTAL STRUCTURE OF THE AP-2 CLATHRIN ADAPTOR ALPHA-APPENDAGE Deposited 1999-06-28	Different construct Different mutation/modification Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 692–938（247 aa） Fragment：C-TERMINAL APPENDAGE (EAR) RESIDUES 701-938	Mutation：SELENOMETHIONINE SUBSTITUTED PROTEIN Non-standard monomer：Yes (specific site not provided by mmCIF)	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.8；293 K；1.5 M MAGNESIUM SULFATE, 100 MM MES, 10MM SPERMINE TETRA-HCL, pH 6.8, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 1.60 Å R-free 0.211
1QTS CRYSTAL STRUCTURE OF THE AP-2 CLATHRIN ADAPTOR ALPHA-APPENDAGE Deposited 1999-06-29	Different construct Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 692–938（247 aa） Fragment：C-TERMINAL APPENDAGE (EAR) RESIDUES 701-938	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.9；293 K；1.3 M AMMONIUM SULFATE, 80 MM HEPES, 8% DIOXANE, pH 6.9, VAPOR DIFFUSION, HANGING DROP, temperature 293K	Resolution 1.40 Å R-free 0.209
1W80 Crystal structure of the alpha-adaptin appendage domain, from the AP2 adaptor complex, bound to 2 peptides from Synaptojanin170 Deposited 2004-09-14	Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 695–938（244 aa） Fragment：APPENDAGE DOMAIN, RESIDUES 695-938	Not recorded	BEN BENZAMIDINE × 1 CO3 CARBONATE ION × 3 DTD DITHIANE DIOL × 1 SO4 SULFATE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions pH 6.5；1.2M AMMONIUM SULFATE, 3% ISOPROPANOL, 0.05M SODIUM CITRATE, pH 6.50	Resolution 1.90 Å R-free 0.224
2JKR AP2 CLATHRIN ADAPTOR CORE with Dileucine peptide RM(phosphoS)QIKRLLSE Deposited 2008-08-29	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric	Chain A 1–271（271 aa） Fragment：ALPHA CHAIN, RESIDUES 1-620 Chain A 272–620（349 aa） Fragment：ALPHA CHAIN, RESIDUES 1-620	Not recorded	SO4 SULFATE ION × 14	X-RAY DIFFRACTION X-ray crystallization conditions pH 6.5；1.7-2.2M AMMONIUM SULPHATE, 100MM SODIUM CITRATE PH6 .5 AND 5MM DTT FROM A MIXTURE OF 10MG/ML AP2 CORE AND 7MG/ML PEPTIDE. CRYOPROTECTED WITH 1.8-2.3M AMMONIUM SULPHATE, 100MM SODIUM CITRATE PH 6.5, 17% GLYCEROL AND 7MG/ ML CD4 DILEUCINE PEPTIDE	Resolution 2.98 Å R-free 0.260
2JKR AP2 CLATHRIN ADAPTOR CORE with Dileucine peptide RM(phosphoS)QIKRLLSE Deposited 2008-08-29	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric	Chain L 1–271（271 aa） Fragment：ALPHA CHAIN, RESIDUES 1-620 Chain L 272–620（349 aa） Fragment：ALPHA CHAIN, RESIDUES 1-620	Not recorded	SO4 SULFATE ION × 17	X-RAY DIFFRACTION X-ray crystallization conditions pH 6.5；1.7-2.2M AMMONIUM SULPHATE, 100MM SODIUM CITRATE PH6 .5 AND 5MM DTT FROM A MIXTURE OF 10MG/ML AP2 CORE AND 7MG/ML PEPTIDE. CRYOPROTECTED WITH 1.8-2.3M AMMONIUM SULPHATE, 100MM SODIUM CITRATE PH 6.5, 17% GLYCEROL AND 7MG/ ML CD4 DILEUCINE PEPTIDE	Resolution 2.98 Å R-free 0.260
2JKT AP2 CLATHRIN ADAPTOR CORE with CD4 Dileucine peptide RM(phosphoS) EIKRLLSE Q to E mutant Deposited 2008-08-29	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric	Chain A 1–271（271 aa） Fragment：ALPHA CHAIN, RESIDUES 1-620 Chain A 272–620（349 aa） Fragment：ALPHA CHAIN, RESIDUES 1-620	Not recorded	SO4 SULFATE ION × 15	X-RAY DIFFRACTION X-ray crystallization conditions pH 6.5；1.7-2.2M AMMONIUM SULPHATE, 100MM SODIUM CITRATE PH6 .5 AND 5MM DTT FROM A MIXTURE OF 10MG/ML AP2 CORE AND 7MG/ML PEPTIDE. CRYOPROTECTED WITH 1.8-2.3M AMMONIUM SULPHATE, 100MM SODIUM CITRATE PH 6.5, 17% GLYCEROL AND 7MG/ ML CD4 DILEUCINE PEPTIDE	Resolution 3.40 Å R-free 0.256
2JKT AP2 CLATHRIN ADAPTOR CORE with CD4 Dileucine peptide RM(phosphoS) EIKRLLSE Q to E mutant Deposited 2008-08-29	Different construct Different mutation/modification Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric	Chain L 1–271（271 aa） Fragment：ALPHA CHAIN, RESIDUES 1-620 Chain L 272–620（349 aa） Fragment：ALPHA CHAIN, RESIDUES 1-620	Not recorded	SO4 SULFATE ION × 16	X-RAY DIFFRACTION X-ray crystallization conditions pH 6.5；1.7-2.2M AMMONIUM SULPHATE, 100MM SODIUM CITRATE PH6 .5 AND 5MM DTT FROM A MIXTURE OF 10MG/ML AP2 CORE AND 7MG/ML PEPTIDE. CRYOPROTECTED WITH 1.8-2.3M AMMONIUM SULPHATE, 100MM SODIUM CITRATE PH 6.5, 17% GLYCEROL AND 7MG/ ML CD4 DILEUCINE PEPTIDE	Resolution 3.40 Å R-free 0.256
2VJ0 Crystal structure of the alpha-adaptin appendage domain, from the AP2 adaptor complex, in complex with an FXDNF peptide from amphiphysin1 and a WVXF peptide from synaptojanin P170 Deposited 2007-12-06	Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 693–938（246 aa） Fragment：APPENDAGE DOMAIN, RESIDUES 693-938	Not recorded	BEN BENZAMIDINE × 1 DTD DITHIANE DIOL × 1 SO4 SULFATE ION × 3 CL CHLORIDE ION × 1	X-RAY DIFFRACTION X-ray crystallization conditions pH 6.5；1.2M AMMONIUM SULPHATE, 3% ISOPROPANOL AND 0.05M SODIUM CITRATE PH 6.5	Resolution 1.60 Å R-free 0.208
7OHI FCHO1-peptide-AP2 alpha ear complex Deposited 2021-05-11	Different construct 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 695–938（244 aa）	Not recorded	SO4 SULFATE ION × 5 MES 2-(N-MORPHOLINO)-ETHANESULFONIC ACID × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 6.5；289 K；1.6M Magnesium sulfate heptahydrate 0.1M MES pH 6.5. The crystal were subsequently cryo-protected with ~20% glycerol final.	Resolution 1.41 Å R-free 0.215
7RW8 AP2 bound to heparin in the closed conformation Deposited 2021-08-19	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain A 1–620（620 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE-PROPANE；Blot force -10, 4 second blot, 4 uL sample	Resolution 3.50 Å
7RW9 AP2 bound to heparin in the bowl conformation Deposited 2021-08-19	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain A 1–620（620 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE-PROPANE；Blot force -10, 4 second blot, 4 uL sample	Resolution 3.90 Å
7RWA AP2 bound to heparin and Tgn38 tyrosine cargo peptide Deposited 2021-08-19	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 10 PDB declaration: decameric	Chain A 1–620（620 aa） Chain a 1–620（620 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE-PROPANE；Blot force -10, 4 second blot, 4 uL sample	Resolution 4.70 Å
7RWB AP2 bound to the APA domain of SGIP in the presence of heparin Deposited 2021-08-19	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 8 PDB declaration: octameric	Chain A 1–620（620 aa） Chain a 1–620（620 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE-PROPANE；Blot force -10, 4 second blot, 4 uL sample	Resolution 3.90 Å
7RWC AP2 bound to the APA domain of SGIP and heparin; partial signal subtraction and symmetry expansion Deposited 2021-08-19	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric	Chain A 1–620（620 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE-PROPANE；Blot force -10, 4 second blot, 4 uL sample	Resolution 3.80 Å
8T1O AP2 bound to MSP2N2 nanodisc with Tgn38 cargo peptide; composite map Deposited 2023-06-02	Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric	Chain A 1–620（620 aa）	Not recorded	PIO [(2R)-2-octanoyloxy-3-[oxidanyl-[(1R,2R,3S,4R,5R,6S)-2,3,6-tris(oxidanyl)-4,5-diphosphonooxy-cyclohexyl]oxy-phosphoryl]oxy-propyl] octanoate × 1	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4；20 mM HEPES pH 7.4, 100 mM NaCl cryo-EM vitrification conditions Cryogen ETHANE-PROPANE；Two applications of sample.	Resolution 3.30 Å
9PPP Structure of Alpha Appendage of AP2 bound to the extended FxDxF motif derived of CCDC32 Deposited 2025-07-21	Different construct 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 695–938（244 aa）	Not recorded	1PE PENTAETHYLENE GLYCOL × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293 K；100 mM SPG pH 8.0, 25% PEG 1500	Resolution 2.10 Å R-free 0.205
9PPP Structure of Alpha Appendage of AP2 bound to the extended FxDxF motif derived of CCDC32 Deposited 2025-07-21	Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 695–938（244 aa）	Not recorded	1PE PENTAETHYLENE GLYCOL × 1	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；293 K；100 mM SPG pH 8.0, 25% PEG 1500	Resolution 2.10 Å R-free 0.205
9PUE Structure of Alpha Appendage of AP2 bound to the FxDxF motif derived of CCDC32 Deposited 2025-07-30	Different construct Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 695–938（244 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 6.5；298 K；40% isopropanol, 100 mM imidazole pH 6.5, 15% PEG 8000	Resolution 1.91 Å R-free 0.230
9PWA Closed AP-2 clathrin adaptor complex in solution Deposited 2025-08-04	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain A 1–620（620 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.6 cryo-EM vitrification conditions Cryogen ETHANE-PROPANE	Resolution 2.55 Å
9PWB Structure of AP-2 bound to the dileucine motif of CCDC32; combined map Deposited 2025-08-04	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric	Chain A 9–620（612 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.6 cryo-EM vitrification conditions Cryogen ETHANE-PROPANE	Resolution 2.64 Å
9PWC Composite structure of AP-2 bound to the dileucine motif and WxxPhi motif of CCDC32 Deposited 2025-08-04	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric	Chain A 1–620（620 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.6 cryo-EM vitrification conditions Cryogen ETHANE-PROPANE	Resolution 3.00 Å

23 other PDB entries and 26 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	AP2A2_MOUSE
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–238； UniProt 701–938

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.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	1b9k
Deposition date deposition_date	1999-02-11
Structure title title	ALPHA-ADAPTIN APPENDAGE DOMAIN, FROM CLATHRIN ADAPTOR AP2
Keywords keywords	ENDOCYTOSIS, ADAPTOR, ENDOCYTOSIS-EXOCYTOSIS COMPLEX; ENDOCYTOSIS/EXOCYTOSIS
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	21.25 Å
Radius of gyration Rg (electron density) rg_electron	20.29 Å
Forward intensity I(0) i0	12365700.00
Molecular weight molecular_weight	26627.0 kDa
Excluded volume excluded_volume	33514 Å³
Envelope volume envelope_volume	39426 Å³
Hydration-shell volume shell_volume	17205 Å³
Envelope diameter envelope_diameter	73.0 Å
Shell Rg shell_rg	25.72 Å
Envelope Rg envelope_rg	20.52 Å
Shape Rg shape_rg	20.30 Å
Total Rg total_rg	21.08 Å
Total atoms total_atoms	1875
Residues n_residues	237
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	73.7 Å
Rg (real space) rg_real	21.35 Å
Rg uncertainty (real space) rg_real_error	0.58 Å
I(0) (real space) i0_real	1.2370e+07
I(0) uncertainty (real space) i0_real_error	1.7250e+05
Rg (reciprocal space) rg_reciprocal	21.34 Å
I(0) (reciprocal space) i0_reciprocal	12370000.0000
Solution quality estimate total_estimate	0.8532
Solution quality rating solution_quality	GOOD a GOOD solution
P(r) peaks n_peaks	2
Primary peak position r_peak_primary	21.7 Å
Skewness Skewness skewness	0.467
Kurtosis Kurtosis kurtosis	-0.287
Angular range angular_range	— – 0.3750 Å⁻¹
Current regularization parameter α current_alpha	0.0000
Highest regularization parameter α highest_alpha	3407000.0000
Real-space data points n_real_points	69
GNOM version gnom_version	4.1.3
Quality Criteria quality_criteria	AN1: 0.000; Oscil: 0.747; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.852; Smooth: 0.995

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5. Crystallography and Experiment 5. Crystallography & Experiment

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6. Entities and Polymers Entities & Polymers (2)

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7. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1b9ka1
Class class	b — All beta proteins
Fold Fold fold	b.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamily	b.1.10 — Clathrin adaptor appendage domain
Family Family family	b.1.10.1 — Alpha-adaptin ear subdomain-like

Domain ID domain_id	d1b9ka2
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.105 — Subdomain of clathrin and coatomer appendage domain
Superfamily Superfamily superfamily	d.105.1 — Subdomain of clathrin and coatomer appendage domain
Family Family family	d.105.1.1 — Clathrin adaptor appendage, alpha and beta chain-specific domain

CATH v4.4 (2 domains)

Domain ID domain_id	1b9kA01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	40 — Immunoglobulin-like
Homologous superfamily homologous superfamily	1230 — Gamma-adaptin ear (GAE) domain

Domain ID domain_id	1b9kA02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	310 — TATA-Binding Protein
Homologous superfamily homologous superfamily	10 — TATA-Binding Protein

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8. Citations (1)

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Unit-cell length a length_a	39.860 Å
Unit-cell length b length_b	40.870 Å
Unit-cell length c length_c	42.470 Å
Unit-cell angle α angle_alpha	99.40 °
Unit-cell angle β angle_beta	95.29 °
Unit-cell angle γ angle_gamma	113.69 °
Molecules per unit cell Z z_pdb	1

Space group space_group	P 1
Space-group number int_tables_number	1
Crystal system crystal_system	—

Resolution resolution	1.900 Å
Low-resolution limit resolution_low	15.550 Å
R factor r_factor	0.1720
R_work r_work	0.1630
R_free r_free	0.2210

Description description	PROTEIN (ALPHA-ADAPTIN APPENDAGE DOMAIN)
Molecular weight formula_weight	27016.8 kDa
Source method src_method	man
Copy count entity_count	1

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	2177

ALPHA-ADAPTIN APPENDAGE DOMAIN, FROM CLATHRIN ADAPTOR AP2

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

PROTEIN (ALPHA-ADAPTIN APPENDAGE DOMAIN)

State in the Current Structure

Other States of the Same Protein in the Database

SAXS scattering curve SAXS Profile

P(r) Distance Distribution P(r) Distribution

2. Structure Basics 2. Structure Basics

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

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

5. Crystallography and Experiment 5. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

6. Entities and Polymers Entities & Polymers (2)

Entity 1 Entity 1 polymer

Polymer Polymer

来源 Source

Entity 2 Entity 2 water

7. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

8. Citations (1)

9. Files and Curves (10)

Files (7)

Curves (3)

来源生物 organism	Mus musculus
通用名 common_name	house mouse
NCBI Class编号 ncbi_taxonomy_id	10090
宿主生物 host_organism	Escherichia coli

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	302

fit	/app/data/saxs_computation/b9/1b9k/1b9k.fit
pddf	/app/data/pr_computation/b9/1b9k/1b9k.pr.out
profile	/app/data/saxs_computation/b9/1b9k/1b9k.dat