2CO6

Salmonella enterica SafA pilin in complex with the SafB chaperone (Type I)

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
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: SCOP/SCOPe Classification SCOP Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d2co6a_	All beta proteins	Common fold of diphtheria toxin/transcription factors/cytochrome f	Bacterial adhesins	Pilus subunits	automated matches	(Salmonella enterica subsp. enterica serovar Typhimurium str. LT2 ) [TaxId: 99287 ],	SCOPe (2.08)
B	d2co6b1	All beta proteins	Immunoglobulin-like beta-sandwich	PapD-like	Pilus chaperone	Periplasmic chaperone SafB	(Salmonella enterica subsp. enterica serovar Typhimurium str. LT2 ) [TaxId: 99287 ],	SCOPe (2.08)
B	d2co6b2	All beta proteins	C2 domain-like	Periplasmic chaperone C-domain	Periplasmic chaperone C-domain	Periplasmic chaperone SafB	(Salmonella enterica subsp. enterica serovar Typhimurium str. LT2 ) [TaxId: 99287 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Bacterial adhesin-like	8039117	3000723	SCOP2B (2022-06-29)
B	SCOP2 Family	Pilus chaperone	8055324	4007561	SCOP2 (2022-06-29)
B	SCOP2 Family	Periplasmic chaperone C-domain	8020398	4002248	SCOP2 (2022-06-29)
B	SCOP2 Superfamily	PapD-like	8055325	3002067	SCOP2 (2022-06-29)
B	SCOP2 Superfamily	Periplasmic chaperone C-domain	8032778	3000998	SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Saf-Nte_pilin	e2co6A1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Common fold of diphtheria toxin/transcription factors/cytochrome f	F: Saf-Nte_pilin	ECOD (1.6)
B	PapD_C	e2co6B1	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)
B	PapD_N	e2co6B2	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)
A	2.60.40.1570	Mainly Beta	Sandwich	Immunoglobulin-like	Dr adhesin	CATH (4.3.0)
B	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	PF09460	Saf-pilin pilus formation protein (Saf-Nte_pilin)	Saf-pilin pilus formation protein	This domain consists of the adjacent Saf-Nte and Saf-pilin chains of the pilus-forming complex. Pilus assembly in Gram-negative bacteria involves a Donor-strand exchange mechanism between the C- and the N-termini of this domain. The C-terminal subuni ...	This domain consists of the adjacent Saf-Nte and Saf-pilin chains of the pilus-forming complex. Pilus assembly in Gram-negative bacteria involves a Donor-strand exchange mechanism between the C- and the N-termini of this domain. The C-terminal subunit forms an incomplete Ig-fold which is then complemented by the 10-18 residue N-terminus of another, incoming, pilus subunit which is not involved in the Ig-fold. The N-terminus sequences contain a motif of alternating hydrophobic residues that occupy the P2 to P5 binding pockets in the groove of the first pilus subunit [1].	Domain
B	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
B	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
A	PUTATIVE OUTER MEMBRANE PROTEIN	-	-	-
B	PUTATIVE FIMBRIAE ASSEMBLY CHAPERONE	-	cellular component organization cell wall organization or biogenesis cell wall organization cellular process cellular component organization or biogenesis external encapsulating structure organization organonitrogen compound metabolic process cellular biosynthetic process cellular metabolic process primary metabolic process gene expression chaperone-mediated protein folding macromolecule biosynthetic process protein maturation cellular component organization cell wall organization or biogenesis cell wall organization cellular process cellular component organization or biogenesis external encapsulating structure organization organonitrogen compound metabolic process cellular biosynthetic process cellular metabolic process primary metabolic process gene expression chaperone-mediated protein folding macromolecule biosynthetic process protein maturation organic substance metabolic process protein folding biosynthetic process organic substance biosynthetic process nitrogen compound metabolic process metabolic process protein metabolic process macromolecule metabolic process	outer membrane-bounded periplasmic space cell envelope periplasmic space cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR037028	Dr-adhesin superfamily	Homologous Superfamily
A	IPR018569	Saf-pilin pilus formation protein	Domain
A	IPR008966	Adhesion domain superfamily	Homologous Superfamily
B	IPR036316	Pili assembly chaperone, C-terminal domain superfamily	Homologous Superfamily
B	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
B	IPR016148	Pili assembly chaperone, C-terminal	Domain
B	IPR008962	PapD-like superfamily	Homologous Superfamily
B	IPR016147	Pili assembly chaperone, N-terminal	Domain
B	IPR001829	Pili assembly chaperone, bacterial	Family
B	IPR018046	Pili assembly chaperone, conserved site	Conserved Site

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.