SUPERFAMILY 1.75 HMM library and genome assignments server

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gp9 superfamily

SCOP classification
Root:   SCOP hierarchy in SUPERFAMILY [ 0] (11)
Class:   All beta proteins [ 48724] (174)
Fold:   gp9 [ 50016]
Superfamily:   gp9 [ 50017]
Families:   gp9 [ 50018]

Superfamily statistics
Genomes (4) Uniprot 2018_03 genome PDB chains (SCOP 1.75)
Domains 4 623 1
Proteins 4 622 1

Functional annotation
General category Other
Detailed category Viral proteins

Function annotation of SCOP domain superfamilies

InterPro annotation
Cross references IPR008987 SSF50017 Protein matches

The T4 bacteriophage is a double-stranded, structurally complex virus that infects Escherichia coli. Gene product 9 (gp9) connects the long tail fibres to the baseplate, and triggers baseplate reorganization and tail contraction after virus attachment to the host cell. The gp9 protein forms a homotrimer, with each monomer having three domains: the N-terminal alpha-helical domain forms a triple coiled coil, the middle domain is a mixed, seven-stranded beta sandwich with a unique fold, and the C-terminal domain is a eight-stranded beta-sandwich with similarity to jellyroll viral capsid protein structures [PubMed10545330]. The flexible loops that occur between domains may enable the conformational changes necessary during infection.

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 ]

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 1 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 gp9 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 1 hidden Markov models representing the gp9 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 · Internal database links ]