SUPERFAMILY 1.73 HMM library and genome assignments server


YbaK/ProRS associated domain superfamily

SCOP classification
Root:   SCOP hierarchy in SUPERFAMILY [ 0] (11)
Class:   Alpha and beta proteins (a+b) [ 53931] (334)
  Mainly antiparallel beta sheets (segregated alpha and beta regions)
Fold:   YbaK/ProRS associated domain [ 55825]
  core: alpha-beta-alpha-beta(2)-(alpha-beta)2-alpha-beta(2)-alpha-beta; 3 layers; bifurcated mixed sheet
Superfamily:   YbaK/ProRS associated domain [ 55826]
Families:   YbaK/ProRS associated domain [ 55827] (4)
  Pfam 04073


Superfamily statistics
Genomes (964) UniProt 15.0 PDB chains (SCOP 1.73)
Domains 2,070 2,524 4
Proteins 2,070 2,524 4


Functional annotation
General category Other
Detailed category Unknown function

Function annotation of SCOP domain superfamilies
InterPro annotation
Cross references IPR007214 SSF55826 Protein matches
Abstract This domain of unknown function is found in numerous prokaryote organisms. The structure of YbaK shows a novel fold. This domain also occurs in a number of prolyl-tRNA synthetases (proRS) from prokaryotes. Thus, the domain is thought to be involved in oligonucleotide binding, with possible roles in recognition/discrimination or editing of prolyl-tRNA [PubMed10813833].

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 4 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 YbaK/ProRS associated 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 4 hidden Markov models representing the YbaK/ProRS associated 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 ]