HAMAP rule MF_04114

Accession	MF_04114
Dates	11-OCT-2017 (Created) 23-AUG-2022 (Last updated, Version 4)

Name

PORTAL_T4

Scope

Viruses; Caudoviricetes

Template

P13334 (PORTL_BPT4)

Triggered by

HAMAP; MF_04114 (Get profile general information and statistics)

Identifier

PORTL

Protein name

RecName: Full=Portal protein; AltName: Full=gp20;

Function	Forms the portal vertex of the capsid. This portal plays critical roles in head assembly, genome packaging, neck/tail attachment, and genome ejection. The portal protein multimerizes as a single ring-shaped homododecamer arranged around a central channel. Binds to the terminase subunits to form the packaging machine.
Subunit	Homododecamer. Interacts with the large terminase subunit. Interacts with the major capsid protein. Interacts with the capsid vertex protein.
Subcellular location	Virion. Note=Located at a unique 5-fold vertex of the icosahedral capsid.
Similarity	Belongs to the Tevenvirinae portal protein family.

Capsid protein
Viral capsid assembly
Viral contractile tail ejection system
Viral genome ejection through host cell envelope
Viral genome packaging
Viral penetration into host cytoplasm
Viral release from host cell
Virion
Virus entry into host cell

GO:0019028; Cellular component: viral capsid.
GO:0099000; Biological process: viral genome ejection through host cell envelope, contractile tail mechanism.
GO:0019076; Biological process: viral release from host cell.
GO:0019072; Biological process: viral genome packaging.

Pfam	PF07230; Peptidase_S80; 1;

Size range	414-631 amino acids
Related rules	None
Fusion	None

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