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Tetraspanin superfamily

SCOP classification
Root:   SCOP hierarchy in SUPERFAMILY [ 0] (11)
Class:   All alpha proteins [ 46456] (284)
Fold:   Tetraspanin [ 48651]
Superfamily:   Tetraspanin [ 48652]
Families:   Tetraspanin [ 48653]


Superfamily statistics
Genomes (218) Uniprot 2018_03 genome PDB chains (SCOP 1.75)
Domains 4,673 13,037 1
Proteins 4,640 12,908 1


Functional annotation
General category Processes_EC
Detailed category Immune response

Document:
Function annotation of SCOP domain superfamilies

Mouse Phenotype (MP)

(show details)
MP termFDR (all)SDMP levelAnnotation (direct or inherited)
Mammalian Phenotype (MP)cardiovascular system phenotype0.3839Least InformativeInherited
Mammalian Phenotype (MP)abnormal blood vessel morphology0.05053Moderately InformativeInherited
Mammalian Phenotype (MP)abnormal eye morphology0.1883Moderately InformativeInherited
Mammalian Phenotype (MP)abnormal retinal neuronal layer morphology0.01651InformativeInherited
Mammalian Phenotype (MP)abnormal retinal vasculature morphology0.0002833Highly InformativeDirect
Mammalian Phenotype (MP)thin retinal outer nuclear layer0.0003344Highly InformativeDirect

Document: MP annotation of SCOP domains

Worm Phenotype (WP)

(show details) Document: WP annotation of SCOP domains

Fly Anatomy (FA)

(show details)
FA termFDR (all)SDFA levelAnnotation (direct or inherited)
Fly Anatomy (FA)somatic cell0.7268Least InformativeInherited
Fly Anatomy (FA)somatic precursor cell0.3641Moderately InformativeInherited
Fly Anatomy (FA)sensory mother cell0.0003967Highly InformativeDirect

Document: FA annotation of SCOP domains

Zebrafish Anatomy (ZA)

(show details) Document: ZA annotation of SCOP domains

Xenopus Anatomy (XA)

(show details) Document: XA annotation of SCOP domains

InterPro annotation
Cross references IPR008952 SSF48652 Protein matches
Abstract

Tetraspanins are a distinct family of proteins, containing four transmembrane domains: a small outer loop (EC1), a larger outer loop (EC2), a small inner loop (IL) and short cytoplasmic tails. They contain characteristic structural features, including 4-6 conserved extracellular cysteine residues, and polar residues within transmembrane domains.

A fundamental role of tetraspanins appears to be organizing other proteins into a network of multimolecular membrane microdomains, sometimes called the `tetraspanin web'. Within this web there are primary complexes in which tetraspanins show robust, specific, and direct lateral associations with other proteins. The strong tendency of tetraspanins to associate with each other probably contributes to the assembly of a network of secondary interactions in which non-tetraspanin proteins are associated with each other via palmitoylated tetraspanins acting as linker proteins. In addition, the association of lipids, such as gangliosides and cholesterol, probably contributes to the assembly of even larger tetraspanin complexes, which have some lipid raft-like properties (e.g. resistance to solubilization in non-ionic detergents). Within the tetraspanin web, tetraspanin proteins can associate not only with integrins and other transmembrane proteins, but also with signalling enzymes such as protein kinase C and phosphatidylinositol-4 kinase. Thus, the tetraspanin web provides a mechanistic framework by which membrane protein signalling can be expanded into a lateral dimension [PubMed12575999].

The tetraspanin domain consists of 5 helices in an irregular disulphide-linked array which plays a role in form homodimerization.


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 · Mouse Phenotype (MP) · Worm Phenotype (WP) · Fly Anatomy (FA) · Zebrafish Anatomy (ZA) · Xenopus Anatomy (XA) ]

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 Tetraspanin 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 Tetraspanin 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 · Mouse Phenotype (MP) · Worm Phenotype (WP) · Fly Anatomy (FA) · Zebrafish Anatomy (ZA) · Xenopus Anatomy (XA) · Internal database links ]