3SQB | pdb_00003sqb

Structure of the major type 1 pilus subunit FimA bound to the FimC chaperone

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
D	SCOP2B Superfamily	Bacterial adhesin-like	8098074	3000723	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Bacterial adhesin-like	8098074	3000723	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	Periplasmic chaperone C-domain	8035665	3000998	SCOP2B (2022-06-29)
E	SCOP2B Superfamily	PapD-like	8055315	3002067	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Periplasmic chaperone C-domain	8035665	3000998	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	PapD-like	8055315	3002067	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Periplasmic chaperone C-domain	8035665	3000998	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	PapD-like	8055315	3002067	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
H	Fimbrial_1	e3sqbH1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Common fold of diphtheria toxin/transcription factors/cytochrome f	F: Fimbrial_1	ECOD (1.6)
F	Fimbrial_1	e3sqbF2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Common fold of diphtheria toxin/transcription factors/cytochrome f	F: Fimbrial_1	ECOD (1.6)
D	Fimbrial_1	e3sqbD2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Common fold of diphtheria toxin/transcription factors/cytochrome f	F: Fimbrial_1	ECOD (1.6)
B	Fimbrial_1	e3sqbB2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Common fold of diphtheria toxin/transcription factors/cytochrome f	F: Fimbrial_1	ECOD (1.6)
G	PapD_N	e3sqbG1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PapD_N	ECOD (1.6)
E	PapD_C	e3sqbE4	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PapD_C	ECOD (1.6)
E	PapD_N	e3sqbE3	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PapD_N	ECOD (1.6)
C	PapD_C	e3sqbC4	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PapD_C	ECOD (1.6)
C	PapD_N	e3sqbC3	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PapD_N	ECOD (1.6)
A	PapD_C	e3sqbA1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PapD_C	ECOD (1.6)
A	PapD_N	e3sqbA2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: PapD_N	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
D	2.60.40.1090	Mainly Beta	Sandwich	Immunoglobulin-like	Fimbrial-type adhesion domain	CATH (4.3.0)
B	2.60.40.1090	Mainly Beta	Sandwich	Immunoglobulin-like	Fimbrial-type adhesion domain	CATH (4.3.0)
E	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
C	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
A	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, C, E, G	PF02753	Pili assembly chaperone PapD, C-terminal domain (PapD_C)	Pili assembly chaperone PapD, C-terminal domain	Ig-like beta-sandwich fold. This domain is the C-terminal part of the pilus and flagellar-assembly chaperone protein PapD.	Domain
A, C, E, G	PF00345	Pili and flagellar-assembly chaperone, PapD N-terminal domain (PapD_N)	Pili and flagellar-assembly chaperone, PapD N-terminal domain	C2 domain-like beta-sandwich fold. This domain is the n-terminal part of the PapD chaperone protein for pilus and flagellar assembly.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B, D, F, H	Type-1 fimbrial protein, A chain	identical protein binding protein binding binding	cell adhesion involved in biofilm formation cell aggregation biofilm formation biological process involved in intraspecies interaction between organisms cell-substrate adhesion single-species biofilm formation aggregation of unicellular organisms submerged biofilm formation cell adhesion involved in single-species biofilm formation cell adhesion cellular process single-species submerged biofilm formation	pilus cell projection cellular anatomical structure
A, C, E, G	Chaperone protein fimC	protein folding chaperone	cellular component organization cell wall organization or biogenesis cell wall organization cellular process cellular component organization or biogenesis external encapsulating structure organization	cellular anatomical structure outer membrane-bounded periplasmic space cell envelope periplasmic space

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B, D, F, H	IPR000259	Fimbrial-type adhesion domain	Domain
B, D, F, H	IPR036937	Fimbrial-type adhesion domain superfamily	Homologous Superfamily
B, D, F, H	IPR050263	Bacterial Fimbrial Adherence	Family
B, D, F, H	IPR008966	Adhesion domain superfamily	Homologous Superfamily
A, C, E, G	IPR036316	Pili assembly chaperone, C-terminal domain superfamily	Homologous Superfamily
A, C, E, G	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A, C, E, G	IPR050643	Periplasmic Pilus Chaperone	Family
A, C, E, G	IPR016148	Pili assembly chaperone, C-terminal	Domain
A, C, E, G	IPR008962	PapD-like superfamily	Homologous Superfamily
A, C, E, G	IPR016147	Pili assembly chaperone, N-terminal	Domain
A, C, E, G	IPR001829	Pili assembly chaperone, bacterial	Family
A, C, E, G	IPR018046	Pili assembly chaperone, conserved site	Conserved Site

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.