SUPERFAMILY 1.75 HMM library and genome assignments server


Ribose/Galactose isomerase RpiB/AlsB superfamily

SCOP classification
Root:   SCOP hierarchy in SUPERFAMILY [ 0] (11)
Class:   Alpha and beta proteins (a/b) [ 51349] (147)
Fold:   Ribose/Galactose isomerase RpiB/AlsB [ 89622]
Superfamily:   Ribose/Galactose isomerase RpiB/AlsB [ 89623]
Families:   Ribose/Galactose isomerase RpiB/AlsB [ 89624] (2)


Superfamily statistics
Genomes (1,800) Uniprot 2014_06 PDB chains (SCOP 1.75)
Domains 2,625 20,282 5
Proteins 2,625 20,280 5


Functional annotation
General category Metabolism
Detailed category Other enzymes

Document:
Function annotation of SCOP domain superfamilies

Enzyme Commission (EC)

(show details)
EC termFDR (all)SDEO levelAnnotation (direct or inherited)
Enzyme Commission (EC)Isomerases0Least InformativeDirect
Enzyme Commission (EC)Intramolecular oxidoreductases0Moderately InformativeDirect
Enzyme Commission (EC)Interconverting aldoses and ketoses, and related c0InformativeDirect

Document: EC annotation of SCOP domains

Enzyme Commission (EC)

(show details)
EC termFDR (all)SDEC levelAnnotation (direct or inherited)
Enzyme Commission (EC)Isomerases0Moderately InformativeDirect
Enzyme Commission (EC)Intramolecular oxidoreductases0InformativeDirect
Enzyme Commission (EC)Interconverting aldoses and ketoses, and related compounds0Highly InformativeDirect

Document: EC annotation of SCOP domains

UniProtKB KeyWords (KW)

(show details)
KW termFDR (all)SDKW levelAnnotation (direct or inherited)
Post-translational modificationIsomerase0Moderately InformativeDirect

Document: KW annotation of SCOP domains

UniProtKB UniPathway (UP)

(show details)
UP termFDR (all)SDUP levelAnnotation (direct or inherited)
UniPathway (UP)carbohydrate metabolism0Least InformativeDirect
UniPathway (UP)carbohydrate degradation0Moderately InformativeDirect
UniPathway (UP)galactose metabolism0Highly InformativeDirect

Document: UP annotation of SCOP domains

InterPro annotation
Cross references IPR003500 SSF89623 Protein matches
Abstract

This entry represents the sugar isomerase enzymes ribose 5-phosphate isomerase B (rpiB), galactose isomerase subunit A (LacA) and galactose isomerase subunit B (LacB).

Galactose-6-phosphate isomerase is a heteromultimeric protein consisting of subunits LacA and LacB, and catalyses the conversion of D-galactose 6-phosphate to D-tagatose and 6-phosphate in the tagatose 6-phosphate pathway of lactose catabolism [PubMed1400164]. Galactose-6-phosphate isomerase is induced by galactose or lactose. This entry represents the LacB subunit.

Ribose 5-phosphate isomerase forms a homodimer and catalyses the interconversion of D-ribose 5-phosphate and D-ribulose 5-phosphate in the non-oxidative branch of the pentose phosphate pathway. This reaction permits the synthesis of ribose from other sugars, as well as the recycling of sugars from nucleotide breakdown. Two unrelated enzymes can catalyse this reaction: RpiA (found in most organisms) and RpiB (found in some bacteria and eukaryotes). RpiB is also involved in metabolism of the rare sugar, allose, in addition to ribose sugars. The structures of RpiA and RpiB are distinct, RpiB having a Rossmann-type alpha/beta/alpha sandwich topology [PubMed14499611].


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

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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 Ribose/Galactose isomerase RpiB/AlsB 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 Ribose/Galactose isomerase RpiB/AlsB 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 · Enzyme Commission (EC) · Enzyme Commission (EC) · UniProtKB KeyWords (KW) · UniProtKB UniPathway (UP) · Internal database links ]