SUPERFAMILY 1.73 HMM library and genome assignments server

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HR1 repeat superfamily

SCOP classification
Root:   SCOP hierarchy in SUPERFAMILY [ 0] (11)
Class:   All alpha proteins [ 46456] (258)
Fold:   Long alpha-hairpin [ 46556] (19)
  2 helices; antiparallel hairpin, left-handed twist
Superfamily:   HR1 repeat [ 46585]
Families:   HR1 repeat [ 46586]
  protein kinase effector domain

 InterPro annotation
Cross references IPR011072 SSF46585 Protein matches
Abstract

The HR1 repeat was first described as a three times repeated homology region of the N-terminal non-catalytic part of protein kinase PRK1(PKN) [PubMed7851406]. The first two of these repeats were later shown to bind the small G protein rho [PubMed8647255, PubMed9446575] known to activate PKN in its GTP-bound form. Similar rho-binding domains also occur in a number of other protein kinases and in the rho-binding proteins rhophilin and rhotekin. Recently, the structure of the N-terminal HR1 repeat complexed with RhoA has been determined by X-ray crystallography [PubMed10619026]. It forms an antiparallel coiled-coil fold termed an ACC finger.


InterPro database
Functional annotation
General category Regulation
Detailed category Kinases/phosphatases

Function annotation of SCOP domain superfamilies

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Internal database links

The SUPERFAMILY hidden Markov model library has been used to carry out SCOP domain assignments to all genomes at the superfamily level. Click on the 'Genome Assignments' icon above to view the genome assignments for this superfamily.


Alignments of sequences to

Alignments of sequences to 2 models in this superfamily are available by clicking on the superfamily level 'Alignments' icon above. PDB sequences less than 40% identical are shown by default, but any other sequences may be aligned. Select PDB sequences, genome sequences, or paste in or upload your own.


It is possible to browse and view the proteins in the genomes which have different combinations of domains including a HR1 repeat domain. Click on the 'Domain Combinations' icon.


To view the distribution of domain superfamilies, or families, across the major taxonomic kingdoms or genomes within a kingdom click on the 'TaxViz' icon above. This gives an immediate impression of how superfamilies, or families, are restricted to certain kingdoms of life.


Undirected domain occurrence networks are available for all superfamilies. Nodes in these networks represent genomes. Connections between nodes represent the presence of domain architectures, which contain the superfamily of interest, in both genomes.

There are 2 hidden Markov models representing the HR1 repeat superfamily. Information on how the models are built, and plots showing hydrophobicity, match emmission probabilities and insertion/deletion probabilities can be viewed by clicking on the icon above.


Jump to [ Top of page · SCOP classification · InterPro annotation · Functional annotation · 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 2001-2009 The Medical Research Council and the SUPERFAMILY authors; Derek Wilson, Martin Madera and Julian Gough.