SUPERFAMILY 1.75 HMM library and genome assignments server

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A virus capsid protein alpha-helical domain superfamily

SCOP classification
Root:   SCOP hierarchy in SUPERFAMILY [ 0] (11)
Class:   All alpha proteins [ 46456] (284)
Fold:   A virus capsid protein alpha-helical domain [ 48344]
Superfamily:   A virus capsid protein alpha-helical domain [ 48345] (3)
Families:   Orbivirus capsid [ 48346]
  Phytoreovirus capsid [ 101395]
  vp6, the major capsid protein of group A rotavirus [ 63596]

Superfamily statistics
Genomes (0) Uniprot 2014_06 PDB chains (SCOP 1.75)
Domains 0 2,065 4
Proteins 0 2,065 4

Functional annotation
General category Other
Detailed category Viral proteins

Function annotation of SCOP domain superfamilies

UniProtKB KeyWords (KW)

(show details)
KW termFDR (all)SDKW levelAnnotation (direct or inherited)
Cellular componentCapsid protein0InformativeDirect
Cellular componentHost cytoplasm0.00000003876InformativeDirect
Molecular functionZinc0Least InformativeDirect
Molecular functionMetal-binding0.00000000001255Least InformativeDirect
Post-translational modificationGlycoprotein0.0002952Least InformativeDirect

Document: KW annotation of SCOP domains

InterPro annotation
Cross references IPR008935 SSF48345 Protein matches

The capsid of spherical viruses is built from a limited number of proteins and often displays icosahedral symmetry. Rotaviruses have a segmented double-stranded RNA genome enclosed in a complex capsid formed by three concentric protein layers. The proteins forming the capsid are VP2 (internal layer, with triangulation T = 1 and an asymmetric dimer in the icosahedral repeating unit), VP6 (intermediate layer, T = 13 symmetry), VP7 (external layer, T = 13) and VP4, which forms a spike inserted in the outermost two layers. The major capsid protein VP6 self-assembles into spherical or helical particles mainly depending upon pH. VP6 assemblies arise from different pickings of a unique dimer of trimers. The repeating unit of the helix contains a pair of trimers related by a radial dyad [PubMed11285214]. The VP6 trimer is composed of two domains: a head (external) and a base (internal), leaving a central cavity, these are formed by a distal beta-barrel domain and a proximal alpha-helical domain, which interact with the outer and inner layer of the virion, respectively [PubMed11285213].

InterPro database

PDBeMotif information about ligands, sequence and structure motifs
Cross references PDB entries
Ligand binding statistics
Nucleic-acid binding statistics
Occurrence of secondary structure elements
Occurrence of small 3D structural motifs

PDBeMotif resource

Jump to [ Top of page · SCOP classification · InterPro annotation · PDBeMotif links · Functional annotation · UniProtKB KeyWords (KW) ]

Internal database links

Browse genome assignments for this superfamily. The SUPERFAMILY hidden Markov model library has been used to carry out SCOP domain assignments to all genomes at the superfamily level.

Alignments of sequences to 3 models in this superfamily are available by clicking on the 'Alignments' icon above. PDB sequences less than 40% identical are shown by default, but any other sequence(s) may be aligned. Select PDB sequences, genome sequences, or paste in or upload your own sequences.

Browse and view proteins in genomes which have different domain combinations including a A virus capsid protein alpha-helical domain domain.

Examine the distribution of domain superfamilies, or families, across the major taxonomic kingdoms or genomes within a kingdom. This gives an immediate impression of how superfamilies, or families, are restricted to certain kingdoms of life.

Explore domain occurrence network where nodes represent genomes and edges are domain architectures (shared between genomes) containing the superfamily of interest.

There are 3 hidden Markov models representing the A virus capsid protein alpha-helical domain superfamily. Information on how the models are built, and plots showing hydrophobicity, match emmission probabilities and insertion/deletion probabilities can be inspected.

Jump to [ Top of page · SCOP classification · InterPro annotation · PDBeMotif links · Functional annotation · UniProtKB KeyWords (KW) · Internal database links ]