SUPERFAMILY 1.75 HMM library and genome assignments server

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Porins superfamily

SCOP classification
Root:   SCOP hierarchy in SUPERFAMILY [ 0] (11)
Class:   Membrane and cell surface proteins and peptides [ 56835] (58)
Fold:   Transmembrane beta-barrels [ 56924] (6)
Superfamily:   Porins [ 56935] (4)
Families:   Porin [ 56936]
  Maltoporin-like [ 56942] (2)
  Ligand-gated protein channel [ 56948] (4)
  Outer membrane protein transport protein [ 111361]

 Superfamily statistics
Genomes (1,459) Uniprot 2018_03 genome PDB chains (SCOP 1.75)
Domains 33,330 385,940 41
Proteins 33,187 384,604 41

 Functional annotation
General category Processes_IC
Detailed category Transport

Document: Function annotation of SCOP domain superfamilies

UniProtKB KeyWords (KW)

(show details)
KW termFDR (all)SDKW levelAnnotation (direct or inherited)
DomainSignal0Least InformativeDirect

Document: KW annotation of SCOP domains

Jump to [ Top of page · SCOP classification · 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 26 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 Porins 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 26 hidden Markov models representing the Porins 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 · Functional annotation · UniProtKB KeyWords (KW) · Internal database links ]
Please cite: Gough, J., Karplus, K., Hughey, R. and Chothia, C. (2001). "Assignment of Homology to Genome Sequences using a Library of Hidden Markov Models that Represent all Proteins of Known Structure." J. Mol. Biol., 313(4), 903-919.

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© Copyright 2013 The SUPERFAMILY authors and Julian Gough.