SUPERFAMILY 1.73 HMM library and genome assignments server


MIR domain superfamily

SCOP classification
Root:   SCOP hierarchy in SUPERFAMILY [ 0] (11)
Class:   All beta proteins [ 48724] (165)
Fold:   beta-Trefoil [ 50352] (8)
  barrel, closed; n=6, S=12; and a hairpin triplet; meander
duplication: has internal pseudo threefold symmetry
Superfamily:   MIR domain [ 82109]
Families:   MIR domain [ 82110] (2)
  Pfam 02815


Superfamily statistics
Genomes (262) UniProt 15.0 PDB chains (SCOP 1.73)
Domains 1,947 713 2
Proteins 1,462 576 2


Functional annotation
General category Metabolism
Detailed category Transferases

Function annotation of SCOP domain superfamilies
InterPro annotation
Cross references IPR003608 SSF82109 Protein matches
Abstract This is a domain found in ryanodine, inositol trisphosphate receptor and protein O-mannosyltransferase. Inositol 1,4,5-trisphosphate (InsP3) is an intracellular second messenger that transduces growth factor and neurotransmitter signals. InsP3 mediates the release of Ca2+ from intracellular stores by binding to specific Ca2+ channel-coupled receptors. Ryanodine receptors are involved in communication between transverse-tubules and the sarcoplamic reticulum of cardiac and skeletal muscle. The proteins function as a Ca2+-release channels following depolarisation of transverse-tubules [PubMed1645727]. The function is modulated by Ca2+, Mg2+, ATP and calmodulin. Deficiency in the ryanodine receptor may be the cause of malignant hyperthermia (MH) and of central core disease of muscle (CCD) [PubMed7829078]. protein O-mannosyltransferases transfer mannose from DOL-P-mannose to ser or thr residues on proteins.

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 2 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 MIR 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 2 hidden Markov models representing the MIR 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 · Internal database links ]