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465  structures 1401  species 5  interactions 50512  sequences 788  architectures

Family: RRM_1 (PF00076)

Summary: RNA recognition motif. (a.k.a. RRM, RBD, or RNP domain)

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RNA recognition motif. (a.k.a. RRM, RBD, or RNP domain) Provide feedback

The RRM motif is probably diagnostic of an RNA binding protein. RRMs are found in a variety of RNA binding proteins, including various hnRNP proteins, proteins implicated in regulation of alternative splicing, and protein components of snRNPs. The motif also appears in a few single stranded DNA binding proteins. The RRM structure consists of four strands and two helices arranged in an alpha/beta sandwich, with a third helix present during RNA binding in some cases The C-terminal beta strand (4th strand) and final helix are hard to align and have been omitted in the SEED alignment The LA proteins (P05455) have an N terminal rrm which is included in the seed. There is a second region towards the C terminus that has some features characteristic of a rrm but does not appear to have the important structural core of a rrm. The LA proteins (P05455) are one of the main autoantigens in Systemic lupus erythematosus (SLE), an autoimmune disease.

Literature references

  1. Birney E., Kumar S., Krainer A.R. , Nucleic Acid Res 1993;21:5803-5816.: Analysis of the RNA-recognition motif and RS and RGG domains: conservation in metazoan pre-mRNA splicing factors. PUBMED:8290338 EPMC:8290338


Internal database links

External database links

This tab holds annotation information from the InterPro database.

InterPro entry IPR000504

Many eukaryotic proteins containing one or more copies of a putative RNA-binding domain of about 90 amino acids are known to bind single-stranded RNAs [PUBMED:3072706, PUBMED:3192525, PUBMED:3313012]. The largest group of single strand RNA-binding proteins is the eukaryotic RNA recognition motif (RRM) family that contains an eight amino acid RNP-1 consensus sequence [PUBMED:2470643, PUBMED:2467746]. RRM proteins have a variety of RNA binding preferences and functions, and include heterogeneous nuclear ribonucleoproteins (hnRNPs), proteins implicated in regulation of alternative splicing (SR, U2AF, Sxl), protein components of small nuclear ribonucleoproteins (U1 and U2 snRNPs), and proteins that regulate RNA stability and translation (PABP, La, Hu) [PUBMED:3192525, PUBMED:3313012, PUBMED:2467746]. The RRM in heterodimeric splicing factor U2 snRNP auxiliary factor (U2AF) appears to have two RRM-like domains with specialised features for protein recognition [PUBMED:15231733]. The motif also appears in a few single stranded DNA binding proteins.

The typical RRM consists of four anti-parallel beta-strands and two alpha-helices arranged in a beta-alpha-beta-beta-alpha-beta fold with side chains that stack with RNA bases. Specificity of RNA binding is determined by multiple contacts with surrounding amino acids. A third helix is present during RNA binding in some cases [PUBMED:8290338]. The RRM is reviewed in a number of publications [PUBMED:1716386, PUBMED:15853797, PUBMED:16387655].

Gene Ontology

The mapping between Pfam and Gene Ontology is provided by InterPro. If you use this data please cite InterPro.

Domain organisation

Below is a listing of the unique domain organisations or architectures in which this domain is found. More...

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Pfam Clan

This family is a member of clan RRM (CL0221), which has the following description:

This clan contains families that are related to the RNA recognition motif domains. However, not all these families are RNA binding.

The clan contains the following 15 members:

BRAP2 Calcipressin DUF1866 Limkain-b1 Nup35_RRM Nup35_RRM_2 Ribosomal_L23 RNA_bind RRM_1 RRM_2 RRM_3 RRM_5 RRM_6 Smg4_UPF3 XS

Alignments

We store a range of different sequence alignments for families. As well as the seed alignment from which the family is built, we provide the full alignment, generated by searching the sequence database using the family HMM. We also generate alignments using four representative proteomes (RP) sets, the NCBI sequence database, and our metagenomics sequence database. More...

View options

We make a range of alignments for each Pfam-A family. You can see a description of each above. You can view these alignments in various ways but please note that some types of alignment are never generated while others may not be available for all families, most commonly because the alignments are too large to handle.

  Seed
(79)
Full
(50512)
Representative proteomes NCBI
(55800)
Meta
(1095)
RP15
(9087)
RP35
(14852)
RP55
(22632)
RP75
(29915)
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PP/heatmap 1              
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1Cannot generate PP/Heatmap alignments for seeds; no PP data available

Key: ✓ available, x not generated, not available.

Format an alignment

  Seed
(79)
Full
(50512)
Representative proteomes NCBI
(55800)
Meta
(1095)
RP15
(9087)
RP35
(14852)
RP55
(22632)
RP75
(29915)
Alignment:
Format:
Order:
Sequence:
Gaps:
Download/view:

Download options

We make all of our alignments available in Stockholm format. You can download them here as raw, plain text files or as gzip-compressed files.

  Seed
(79)
Full
(50512)
Representative proteomes NCBI
(55800)
Meta
(1095)
RP15
(9087)
RP35
(14852)
RP55
(22632)
RP75
(29915)
Raw Stockholm Download   Download   Download   Download   Download   Download   Download   Download  
Gzipped Download   Download   Download   Download   Download   Download   Download   Download  

You can also download a FASTA format file containing the full-length sequences for all sequences in the full alignment.

External links

MyHits provides a collection of tools to handle multiple sequence alignments. For example, one can refine a seed alignment (sequence addition or removal, re-alignment or manual edition) and then search databases for remote homologs using HMMER3.

HMM logo

HMM logos is one way of visualising profile HMMs. Logos provide a quick overview of the properties of an HMM in a graphical form. You can see a more detailed description of HMM logos and find out how you can interpret them here. More...

Trees

This page displays the phylogenetic tree for this family's seed alignment. We use FastTree to calculate neighbour join trees with a local bootstrap based on 100 resamples (shown next to the tree nodes). FastTree calculates approximately-maximum-likelihood phylogenetic trees from our seed alignment.

Note: You can also download the data file for the tree.

Curation and family details

This section shows the detailed information about the Pfam family. You can see the definitions of many of the terms in this section in the glossary and a fuller explanation of the scoring system that we use in the scores section of the help pages.

Curation View help on the curation process

Seed source: Published_alignment
Previous IDs: rrm;
Type: Domain
Author: Eddy SR, Birney E
Number in seed: 79
Number in full: 50512
Average length of the domain: 67.70 aa
Average identity of full alignment: 24 %
Average coverage of the sequence by the domain: 23.75 %

HMM information View help on HMM parameters

HMM build commands:
build method: hmmbuild -o /dev/null HMM SEED
search method: hmmsearch -Z 23193494 -E 1000 --cpu 4 HMM pfamseq
Model details:
Parameter Sequence Domain
Gathering cut-off 20.7 20.7
Trusted cut-off 20.7 20.7
Noise cut-off 20.6 20.6
Model length: 70
Family (HMM) version: 17
Download: download the raw HMM for this family

Species distribution

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This visualisation provides a simple graphical representation of the distribution of this family across species. You can find the original interactive tree in the adjacent tab. More...

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Interactions

There are 5 interactions for this family. More...

Mago-bind RRM_1 MIF4G_like_2 Mago_nashi MIF4G_like

Structures

For those sequences which have a structure in the Protein DataBank, we use the mapping between UniProt, PDB and Pfam coordinate systems from the PDBe group, to allow us to map Pfam domains onto UniProt sequences and three-dimensional protein structures. The table below shows the structures on which the RRM_1 domain has been found. There are 465 instances of this domain found in the PDB. Note that there may be multiple copies of the domain in a single PDB structure, since many structures contain multiple copies of the same protein seqence.

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