Q3ZK56 · VP2_ROT41

Function

function

Inner capsid protein that self-assembles to form an icosahedral capsid with a T=2 symmetry, which consists of 120 copies of VP2, with channels at each of its five-fold vertices. This capsid constitutes the innermost concentric layer of the viral mature particle. It encapsidates the polymerase VP1, the capping enzyme VP3 and the genomic dsRNA, thereby defining the core. The innermost VP2 capsid and the intermediate VP6 capsid remain intact following cell entry to protect the dsRNA from degradation and to prevent unfavorable antiviral responses in the host cell during all the replication cycle of the virus. Nascent transcripts are transcribed within the structural confines of this double-layered particle (DLP) and are extruded through the channels formed by VP2 N-termini. VP2 is required for the replicase activity of VP1 polymerase. Probably recruits a copy of a VP1-VP3 complex, potentially along with a segment of plus-strand RNA, as a decamer of VP2 assembles. May activate the autoinhibited VP1/RNA complex to coordinate packaging and genome replication.

Features

Showing features for site.

1880100200300400500600700800
TypeIDPosition(s)Description
Site220Interaction with the intermediate capsid protein VP6
Site224Interaction with the intermediate capsid protein VP6
Site228Interaction with the intermediate capsid protein VP6
Site839Interaction with the intermediate capsid protein VP6
Site841Interaction with the intermediate capsid protein VP6

GO annotations

AspectTerm
Cellular ComponentT=2 icosahedral viral capsid
Cellular Componentviral inner capsid
Cellular Componentviral nucleocapsid
Molecular FunctionRNA binding

Keywords

Names & Taxonomy

Protein names

  • Recommended name
    Inner capsid protein VP2

Organism names

Accessions

  • Primary accession
    Q3ZK56

Proteomes

Subcellular Location

Virion
Note: Inner capsid protein. Also found in spherical cytoplasmic structures, called virus factories, that appear early after infection and are the site of viral replication and packaging.

Keywords

PTM/Processing

Features

Showing features for chain.

TypeIDPosition(s)Description
ChainPRO_00003680491-880Inner capsid protein VP2

Post-translational modification

Sumoylated with SUMO1 and SUMO2. Sumoylation of viral proteins seems to have a positive role on viral replication.

Keywords

Interaction

Subunit

Homodecamer; each decamer is made up of two conformers of VP2, called VP2A and VP2B. Interacts with a VP1-VP3 complex. Interacts with the intermediate capsid protein VP6. Interacts with NSP5. Interacts (via N-terminus) with NSP2.

Structure

3D structure databases

Family & Domains

Features

Showing features for region.

TypeIDPosition(s)Description
Region1-43Disordered
Region1-805-fold hub; involved in the encapsidation of VP1 and VP3
Region394-414Hydrophobic
Region422-442Hydrophobic

Domain

The N-terminus binds RNA. It is necessary for encapsidation of VP1 and VP3. The N-termini of 10 VP2 molecules form a cylindrical hub underneath each 5-fold axis of the inner capsid.

Sequence similarities

Belongs to the rotavirus VP2 family.

Keywords

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    880
  • Mass (Da)
    102,423
  • Last updated
    2005-09-27 v1
  • Checksum
    A1D428BF6D45AA28
MAYRKRGARREANVNNNDRMQEKDVEKQDQNSKTQLSDKVLSKKEEIITDNQEEVKIADEVKKSTKEESKQLLEVLKTKEEHQKEIQYEILQKTIPTFEPKESILKKLEDIKPEQAKKQTKLFRIFEPRQLPIYRANGEKELRNRWYWKLKKDTLPDGDYDVREYFLNLYDQVLTEMPDYLLLKDMAVENKNSRDAGKVVDSETASICDAIFQDEETEGAVRRFIAEMRQRVQADRNVVNYPSILHPIDYAFNEYFLQHQLVEPLNNDIIFNYIPERIRNDVNYILNMDRNLPSTARYIRPNLLQDRLNLHDNFESLWDTITTSNYILARSVVPDLKELVSTEAQIQKMSQDLQLEALTIQSETQFLTGINSQAANDCFKTLIAAMLSQRTMSLDFVTTNYMSLISGMWLLTVVPNDMFIRESLVACQLAIVNTIVYPAFGMQRMHYRNGDPQTPFQIAEQQIQNFQVANWLHFVNNNQFRQVVIDGVLNQVLNDNIRNGHVINQLMEALMQLSRQQFPTMPVDYKRSIQRGILLLSNRLGQLVDLTRLLAYNYETLMACITMNMQHVQTLTTEKLQLTSVTSLCMLIGNATVIPSPQTLFHYYNVNVNFHSNYNERINDAVAIITAANRLNLYQKKMKAIVEDFLKRLHIFDVARVPDDQMYRLRDRLRLLPVEVRRLDIFNLILMNMDQIERASDKIAQGVIIAYRDMQLERDEMYGYVNIARNLDGFQQINLEELMRTGDYAQITNMLLNNQPVALVGALPFITDSSVISLIAKLDATVFAQIVKLRKVDTLKPILYKINSDSNDFYLVANYDWVPTSTTKVYKQVPQQFDFRNSMHMLTSNLTFTVYSDLLAFVSADTVEPINAVAFDNMRIMNEL

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
AY740740
EMBL· GenBank· DDBJ
AAU43798.1
EMBL· GenBank· DDBJ
Genomic RNA

Similar Proteins

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