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  Home > SCOP hierarchy > SpoIIaa-like superfamily


SpoIIaa-like superfamily

SCOP classification
Root:   SCOP hierarchy in SUPERFAMILY [ 0] (11)
Class:   Alpha and beta proteins (a/b) [ 51349] (147)
Fold:   SpoIIaa-like [ 52086] (2)
Superfamily:   SpoIIaa-like [ 52091] (2)
Families:   Anti-sigma factor antagonist SpoIIaa [ 52092]
  Sfri0576-like [ 159456] (2)

Superfamily statistics
Genomes (2,424) Uniprot 2018_03 genome PDB chains (SCOP 1.75)
Domains 12,648 93,224 8
Proteins 12,614 92,901 8

 Functional annotation
General category Other
Detailed category Unknown function

Document: Function annotation of SCOP domain superfamilies

Human Phenotype (HP)

(show details)
HP termFDR (all)SDHP levelAnnotation (direct or inherited)
Phenotypic Abnormality (PA)Abnormality of the digestive system0.5809Least InformativeInherited
Phenotypic Abnormality (PA)Abnormality of digestive system physiology0.3269Moderately InformativeInherited
Phenotypic Abnormality (PA)Abdominal distention0.0003191Highly InformativeDirect

Document: HP annotation of SCOP domains

Mouse Phenotype (MP)

(show details) Document: MP annotation of SCOP domains

Worm Phenotype (WP)

(show details) Document: WP annotation of SCOP domains

Yeast Phenotype (YP)

(show details) Document: YP annotation of SCOP domains

Xenopus Anatomy (XA)

(show details)
XA termFDR (all)SDXA levelAnnotation (direct or inherited)
Xenopus DEvelopment stage (XDE)embryonic stage0.02445Moderately InformativeInherited
Xenopus DEvelopment stage (XDE)late tailbud stage0.5896InformativeInherited
Xenopus DEvelopment stage (XDE)NF stage 35 and 360.0009378Highly InformativeDirect

Document: XA annotation of SCOP domains

Arabidopsis Plant Ontology (AP)

(show details) Document: AP annotation of SCOP domains

Enzyme Commission (EC)

(show details)
EC termFDR (all)SDEC levelAnnotation (direct or inherited)
Enzyme Commission (EC)Hydrolases0Least InformativeDirect
Enzyme Commission (EC)Acting on carbon-nitrogen bonds, other than peptide bonds0Moderately InformativeDirect
Enzyme Commission (EC)In linear amides0InformativeDirect

Document: EC annotation of SCOP domains

UniProtKB KeyWords (KW)

(show details)
KW termFDR (all)SDKW levelAnnotation (direct or inherited)
Post-translational modificationPhosphoprotein9.992e-16Least InformativeDirect

Document: KW annotation of SCOP domains

InterPro annotation
Cross references IPR002645 SSF52091 Protein matches
Abstract The STAS (Sulphate Transporter and AntiSigma factor antagonist) domain is found in the C-terminal region of sulphate transporters and bacterial anti-sigma factor antagonists. It has been suggested that this domain may have a general NTP binding function. The establishment of differential gene expression in sporulating Bacillus subtilis involves four protein components one of which is SpoIIAA . The four components regulate the sporulation sigma factor F. Early in sporulation, SpoIIAA is in the phosphorylated state (SpoIIAA-P), as a result of the activity of the ATP-dependent protein kinase SpoIIAB . The site at which this protein is a conserved serine. SpoIIAB is an anti-sigma factor that in its free form inhibits F by binding to it. Competition by SpoIIAA (the anti-anti-sigma factor) for binding to SpoIIAB releases Sigma F activity [PubMed9560229]. The STAS domain is found in the anti-sigma factor antagonist SpoIIAA.

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 · Human Phenotype (HP) · Mouse Phenotype (MP) · Worm Phenotype (WP) · Yeast Phenotype (YP) · Xenopus Anatomy (XA) · Arabidopsis Plant Ontology (AP) · Enzyme Commission (EC) · 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 6 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 SpoIIaa-like 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 6 hidden Markov models representing the SpoIIaa-like 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 · Human Phenotype (HP) · Mouse Phenotype (MP) · Worm Phenotype (WP) · Yeast Phenotype (YP) · Xenopus Anatomy (XA) · Arabidopsis Plant Ontology (AP) · Enzyme Commission (EC) · 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.