SUPERFAMILY 1.75 HMM library and genome assignments server

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Ribosomal protein L9 C-domain superfamily

SCOP classification
Root:   SCOP hierarchy in SUPERFAMILY [ 0] (11)
Class:   Alpha and beta proteins (a+b) [ 53931] (376)
Fold:   Ribosomal protein L9 C-domain [ 55652]
Superfamily:   Ribosomal protein L9 C-domain [ 55653]
Families:   Ribosomal protein L9 C-domain [ 55654]

Superfamily statistics
Genomes (2,654) Uniprot 2018_03 genome PDB chains (SCOP 1.75)
Domains 2,779 20,961 6
Proteins 2,779 20,961 6

Functional annotation
General category Information
Detailed category Translation

Function annotation of SCOP domain superfamilies

InterPro annotation
Cross references IPR000244 SSF55653 Protein matches

Ribosomal protein L9 is one of the proteins from the large ribosomal subunit. In Escherichia coli, L9 is known to bind directly to the 23S rRNA. It belongs to a family of ribosomal proteins grouped on the basis of sequence similarities [, PubMed8306963].

The crystal structure of Bacillus stearothermophilus L9 shows the 149-residue protein comprises two globular domains connected by a rigid linker [PubMed12051860]. Each domain contains an rRNA binding site, and the protein functions as a structural protein in the large subunit of the ribosome. The C-terminal domain consists of two loops, an alpha-helix and a three-stranded mixed parallel, anti-parallel beta-sheet packed against the central alpha-helix. The long central alpha-helix is exposed to solvent in the middle and participates in the hydrophobic cores of the two domains at both ends.

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 ]

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 Ribosomal protein L9 C-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 3 hidden Markov models representing the Ribosomal protein L9 C-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 ]