7QOL | pdb_00007qol

Tail assembly of the phicrAss001 virion with C6 symmetry imposed

External Resource: Annotation

Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
B, P [auth Q]	PF24228	Phage tail ring protein 1 (CrAss_Ring_1)	Phage tail ring protein 1	-	Family
C, Q [auth S]	PF25702	Phage tail ring protein 2 (CrAss_Ring_2)	Phage tail ring protein 2	This entry represents the Ring 1 (R2) protein, also known as gp40, which is part of the tail assembly in crassviruses. The R2 protein forms one of five stacked dodecameric rings that make up the tail barrel. These proteins share a conserved fold cons ...	This entry represents the Ring 1 (R2) protein, also known as gp40, which is part of the tail assembly in crassviruses. The R2 protein forms one of five stacked dodecameric rings that make up the tail barrel. These proteins share a conserved fold consisting of two domains: an alpha-helical domain and a beta-sandwich domain. The extended tail barrel formed by these ring proteins is a distinctive feature of crassviruses and may assist the tail muzzle in reaching the outer cell membrane through the compact capsular polysaccharide layer of the host bacteria.	Domain
D, R [auth T]	PF25710	Phage tail ring protein 3/4 (CrAss_Ring_3_4)	Phage tail ring protein 3/4	-	Family
G, H, U [auth W], V [auth Z]	PF25724	Crassvirus tail hub protein A (crAss_THA)	Crassvirus tail hub protein A	-	Family
CA [auth P]	PF25731	Crassvirus muzzle protein (crAss_MUZ)	Crassvirus muzzle protein	-	Family
CA [auth P]	PF25729	Crassvirus muzzle protein C-terminal domain (crAss_MUZ_C)	Crassvirus muzzle protein C-terminal domain	This entry represents the C-terminal beta sandwich domain found in the muzzle protein found at the distal end of the tail in bacteriophages of the Crassviridae family. This large protein forms a hexameric assembly at the tip of the tail barrel and ex ...	This entry represents the C-terminal beta sandwich domain found in the muzzle protein found at the distal end of the tail in bacteriophages of the Crassviridae family. This large protein forms a hexameric assembly at the tip of the tail barrel and exhibits a novel fold designated as the crass fold. The muzzle protein is composed of five domains: a ring-joining domain, a seven-bladed beta-propeller domain, two immunoglobulin-like domains (IG1 and IG2), and the crass domain. The muzzle protein forms a gate-like structure that likely serves as a gatekeeper controlling the ejection of cargo proteins and viral DNA during infection. The gate is formed by a loop within blade 4 of the propeller domain. The crass domain, with its exposed surface loops, likely plays a role in contacting the host cell surface, initiating conformational changes that open the gate. The muzzle protein is highly conserved among crassviruses, though with length variations resulting from insertions in the crass and IG2 domains that affect surface properties. This protein has been structurally characterized in Bacteroides phage crAss001 [1].	Domain
I, W [auth a]	PF25711	Crassvirus tail hub protein B (crAss_THB)	Crassvirus tail hub protein B	-	Family
E, F, S [auth U], T [auth V]	PF25710	Phage tail ring protein 3/4 (CrAss_Ring_3_4)	Phage tail ring protein 3/4	-	Family
A, O	PF25711	Crassvirus tail hub protein B (crAss_THB)	Crassvirus tail hub protein B	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B, P [auth Q]	Ring protein 1 gp43	-	-	virus tail virion component
C, Q [auth S]	Ring protein 2 gp40	-	-	virion component
D, R [auth T]	Ring protein 3 gp35	-	-	virion component
G, H, U [auth W], V [auth Z]	Tail hub protein A gp38	-	-	virus tail virion component
AA [auth e], BA [auth f], M, N	Cargo protein 1 gp45	-	biological process involved in interspecies interaction between organisms symbiont entry into host cell viral process symbiont entry into host viral life cycle biological process involved in interaction with host biological process involved in symbiotic interaction	host cellular component cellular anatomical structure host cell part host cell membrane other organism part virion component
CA [auth P]	Muzzle protein gp44	-	-	virus tail virion component
J, K, L, X [auth b], Y [auth c], J, K, L, X [auth b], Y [auth c], Z [auth d]	Tail fiber protein gp22	-	biological process involved in interspecies interaction between organisms biological process involved in interaction with host biological process involved in symbiotic interaction viral process viral life cycle	virion component
I, W [auth a]	Tail hub protein B gp39	-	-	virus tail virion component
E, F, S [auth U], T [auth V]	Ring protein 4/5 gp34	-	-	virion component
DA [auth R]	Muzzle bound helix	-	-	-
A, O	Portal protein gp20	-	-	viral capsid virion component

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
B, P [auth Q]	IPR057118	Ring protein 1-like	Family
C, Q [auth S]	IPR057878	Phage tail ring protein 2	Family
D, R [auth T]	IPR057877	Phage tail ring protein 3/4	Family
G, H, U [auth W], V [auth Z]	IPR057876	Tail hub protein A	Family
AA [auth e], BA [auth f], M, N	IPR058049	Cargo protein 1, compact domain	Domain
CA [auth P]	IPR057889	Crassvirus muzzle protein, N-terminal region	Domain
CA [auth P]	IPR057888	Crassvirus muzzle protein, C-terminal domain	Domain
J, K, L, X [auth b], Y [auth c], J, K, L, X [auth b], Y [auth c], Z [auth d]	IPR006626	Parallel beta-helix repeat	Repeat
J, K, L, X [auth b], Y [auth c], J, K, L, X [auth b], Y [auth c], Z [auth d]	IPR012334	Pectin lyase fold	Homologous Superfamily
J, K, L, X [auth b], Y [auth c], J, K, L, X [auth b], Y [auth c], Z [auth d]	IPR039448	Right handed beta helix domain	Domain
J, K, L, X [auth b], Y [auth c], J, K, L, X [auth b], Y [auth c], Z [auth d]	IPR011050	Pectin lyase fold/virulence factor	Homologous Superfamily
I, W [auth a]	IPR057875	Tail hub protein B	Family
E, F, S [auth U], T [auth V]	IPR057877	Phage tail ring protein 3/4	Family

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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.