8CKB | pdb_00008ckb

Asymmetric reconstruction of the crAss001 virion

External Resource: Annotation


Protein Family Annotation Pfam Database Homepage

ChainsAccessionNameDescriptionCommentsSource
PF25650Bacteriophage crAss001 auxiliary capsid protein (crAss_AuxCP)Bacteriophage crAss001 auxiliary capsid protein- Family
PF23898Crassvirus major capsid protein (Crass_capsid)Crassvirus major capsid protein- Family
PF25731Crassvirus muzzle protein (crAss_MUZ)Crassvirus muzzle protein- Family
PF25729Crassvirus muzzle protein C-terminal domain (crAss_MUZ_C)Crassvirus muzzle protein C-terminal domainThis 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
PF24228Phage tail ring protein 1 (CrAss_Ring_1)Phage tail ring protein 1- Family
PF25702Phage tail ring protein 2 (CrAss_Ring_2)Phage tail ring protein 2This 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
PF25710Phage tail ring protein 3/4 (CrAss_Ring_3_4)Phage tail ring protein 3/4- Family
PF25710Phage tail ring protein 3/4 (CrAss_Ring_3_4)Phage tail ring protein 3/4- Family
PF25724Crassvirus tail hub protein A (crAss_THA)Crassvirus tail hub protein A- Family
PF25711Crassvirus tail hub protein B (crAss_THB)Crassvirus tail hub protein B- Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

ChainsPolymerMolecular FunctionBiological ProcessCellular Component
Auxiliary capsid protein gp36- -
QS [auth A511]Head fiber dimer protein gp29-
Head fiber dimer protein gp29-
Head fiber trimer protein gp21---
Muzzle bound helix---
Major capsid protein gp32- -
Muzzle protein gp44- -
Cargo protein 1 gp45-
Portal protein gp20- -
Portal vertex capsid protein gp57- -
Ring protein 1 gp43- -
Ring protein 2 gp40- -
Ring protein 3 gp35- -
Ring protein 4/5 gp34- -
Tail fiber protein gp22-
Tail hub protein A gp38- -
Tail hub protein B gp39- -

InterPro: Protein Family Classification InterPro Database Homepage

ChainsAccessionNameType
IPR058048Auxiliary capsid protein, crAss001Family
QS [auth A511]IPR057859HFD-like domainDomain
IPR022741Bacteriophage B103, Gp8, head fibreFamily
IPR056401Major capsid protein, crassvirusFamily
IPR057889Crassvirus muzzle protein, N-terminal regionDomain
IPR057888Crassvirus muzzle protein, C-terminal domainDomain
IPR058049Cargo protein 1, compact domainDomain
IPR057879Portal vertex auxiliary proteinFamily
IPR057118Ring protein 1-likeFamily
IPR057878Phage tail ring protein 2Family
IPR057877Phage tail ring protein 3/4Family
IPR057877Phage tail ring protein 3/4Family
IPR006626Parallel beta-helix repeatRepeat
IPR012334Pectin lyase foldHomologous Superfamily
IPR039448Right handed beta helix domainDomain
IPR011050Pectin lyase fold/virulence factorHomologous Superfamily
IPR057876Tail hub protein AFamily
IPR057875Tail hub protein BFamily