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7  structures 1219  species 0  interactions 4313  sequences 239  architectures

Family: G5 (PF07501)

Summary: G5 domain

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The Pfam group coordinates the annotation of Pfam families in Wikipedia, but we have not yet assigned a Wikipedia article to this family. If you think that a particular Wikipedia article provides good annotation, please let us know.

This tab holds the annotation information that is stored in the Pfam database. As we move to using Wikipedia as our main source of annotation, the contents of this tab will be gradually replaced by the Wikipedia tab.

G5 domain Provide feedback

This domain is found in a wide range of extracellular proteins. It is found tandemly repeated in up to 8 copies. It is found in the N-terminus of peptidases belonging to the M26 family which cleave human IgA. The domain is also found in proteins involved in metabolism of bacterial cell walls suggesting this domain may have an adhesive function.

Literature references

  1. Ruggiero A, Tizzano B, Pedone E, Pedone C, Wilmanns M, Berisio R;, J Mol Biol. 2009;385:153-162.: Crystal structure of the resuscitation-promoting factor (DeltaDUF)RpfB from M. tuberculosis. PUBMED:18992255 EPMC:18992255

  2. Bateman A, Holden MT, Yeats C;, Bioinformatics. 2005;21:1301-1303.: The G5 domain: a potential N-acetylglucosamine recognition domain involved in biofilm formation. PUBMED:15598841 EPMC:15598841


Internal database links

External database links

This tab holds annotation information from the InterPro database.

InterPro entry IPR011098

The G5 domain (named after its conserved glycine residues) is a module of ~80 residues that is found in a variety of enzymes such as Streptococcal IgA peptidases and various glycosyl hydrolases in bacteria. It is found in one to seven copies in association with other domains, such as LysM, bacterial Ig-like, M23 and M26 peptidases, F5/8 type C, vanW or transglycosylase-like. The G5 domain contains a few highly conserved residues. None of these conserved residues are the polar types of amino acids found in active sites, so it seems unlikely this region has an enzymatic function. However, in nearly all cases the G5 domain is associated with a known enzymatic domain. Therefore, the G5 domain may confer localization or substrate specificity on the proteins in which it is found. As a common feature of the proteins containing G5 domains is N-acetylglucosamine binding, it has been suggested that this function might be attributed to the G5 domain. Other alternative functions could be allosteric regulation of the enzymatic domain or cofactor binding [PUBMED:15598841].

Domain organisation

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

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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
(140)
Full
(4313)
Representative proteomes NCBI
(3447)
Meta
(28)
RP15
(260)
RP35
(400)
RP55
(487)
RP75
(576)
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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
(140)
Full
(4313)
Representative proteomes NCBI
(3447)
Meta
(28)
RP15
(260)
RP35
(400)
RP55
(487)
RP75
(576)
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
(140)
Full
(4313)
Representative proteomes NCBI
(3447)
Meta
(28)
RP15
(260)
RP35
(400)
RP55
(487)
RP75
(576)
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.

Pfam alignments:

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: Bateman A
Previous IDs: none
Type: Domain
Author: Bateman A
Number in seed: 140
Number in full: 4313
Average length of the domain: 77.50 aa
Average identity of full alignment: 25 %
Average coverage of the sequence by the domain: 10.80 %

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 20.9 20.9
Trusted cut-off 20.9 20.9
Noise cut-off 20.1 20.8
Model length: 79
Family (HMM) version: 7
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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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 G5 domain has been found. There are 7 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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