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39  structures 19717  species 5  interactions 39621  sequences 39  architectures

Family: Peptidase_M22 (PF00814)

Summary: Glycoprotease family

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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.

Glycoprotease family Provide feedback

The Peptidase M22 proteins are part of the HSP70-actin superfamily ([1]). The region represented here is an insert into the fold and is not found in the rest of the family (beyond the Peptidase M22 family). Included in this family are the Rhizobial NodU proteins and the HypF regulator. This region also contains the histidine dyad believed to coordinate the metal ion and hence provide catalytic activity. Interestingly the histidines are not well conserved, and there is a lack of experimental evidence to support peptidase activity as a general property of this family. There also appear to be instances of this domain outside of the HSP70-actin superfamily (e.g. Q9ZM49).

Literature references

  1. Aravind L, Koonin EV; , J Mol Biol 1999;287:1023-1040.: Gleaning non-trivial structural, functional and evolutionary information about proteins by iterative database searches. PUBMED:10222208 EPMC:10222208


External database links

This tab holds annotation information from the InterPro database.

InterPro entry IPR000905

This domain was identified in proteins including Kae1 and Gcp (YgjD), which were originally thought to be endopeptidases belonging to the peptidase M22 family [PUBMED:1885539]. However, there is a lack of experimental evidence to support peptidase activity as a general property, and this has not been confirmed in other orthologues [PUBMED:17766251, PUBMED:21183954]. Recent research indicates that the Kae1 and Gcp proteins are involved in the biosynthesis of N6-threonylcarbamoyl adenosine, a universal modification found at position 37 of tRNAs that read codons beginning with adenine [PUBMED:21285948]. This domain is also present in Bacillus subtilis YdiC and Escherichia coli YeaZ. These proteins have been recently renamed as TsaB, and have also been shown to be involved in N6-Threonylcarbamoylad enonsine (t(6)A) biosynthesis [PUBMED:23072323, PUBMED:22378793].

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 Actin_ATPase (CL0108), which has the following description:

The actin-like ATPase domain forms an alpha/beta canonical fold. The domain can be subdivided into 1A, 1B, 2A and 2B subdomains. Subdomains 1A and 1B share the same RNAseH-like fold (a five-stranded beta-sheet decorated by a number of alpha-helices). Domains 1A and 2A are conserved in all members of this superfamily, whereas domain 1B and 2B have a variable structure and are even missing from some homologues [1]. Within the actin-like ATPase domain the ATP-binding site is highly conserved. The phosphate part of the ATP is bound in a cleft between subdomains 1A and 2A, whereas the adenosine moiety is bound to residues from domains 2A and 2B[1].

The clan contains the following 31 members:

Acetate_kinase Actin Actin_micro BcrAD_BadFG Carbam_trans_N DDR DUF1464 DUF2229 EutA FGGY_C FGGY_N FtsA Fumble GDA1_CD39 Glucokinase Hexokinase_1 Hexokinase_2 HGD-D HSP70 Hydant_A_N Hydantoinase_A MreB_Mbl MutL Pan_kinase Peptidase_M22 PilM_2 Ppx-GppA ROK StbA T2SSL UPF0075

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
(113)
Full
(39621)
Representative proteomes NCBI
(18188)
Meta
(5233)
RP15
(1001)
RP35
(2420)
RP55
(3498)
RP75
(4511)
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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
(113)
Full
(39621)
Representative proteomes NCBI
(18188)
Meta
(5233)
RP15
(1001)
RP35
(2420)
RP55
(3498)
RP75
(4511)
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
(113)
Full
(39621)
Representative proteomes NCBI
(18188)
Meta
(5233)
RP15
(1001)
RP35
(2420)
RP55
(3498)
RP75
(4511)
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: Pfam-B_1670 (release 2.1) & Pfam-B_4550 (Release 7.5)
Previous IDs: Glycoprotease;
Type: Family
Author: Bateman A
Number in seed: 113
Number in full: 39621
Average length of the domain: 229.30 aa
Average identity of full alignment: 27 %
Average coverage of the sequence by the domain: 79.29 %

HMM information View help on HMM parameters

HMM build commands:
build method: hmmbuild -o /dev/null HMM SEED
search method: hmmsearch -Z 80369284 -E 1000 --cpu 4 HMM pfamseq
Model details:
Parameter Sequence Domain
Gathering cut-off 24.8 24.8
Trusted cut-off 24.8 24.8
Noise cut-off 24.7 24.7
Model length: 268
Family (HMM) version: 21
Download: download the raw HMM for this family

Species distribution

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Archea Archea Eukaryota Eukaryota
Bacteria Bacteria Other sequences Other sequences
Viruses Viruses Unclassified Unclassified
Viroids Viroids Unclassified sequence Unclassified sequence

Selections

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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...

Pkinase Sua5_yciO_yrdC Peptidase_M22 Pcc1 Pkinase

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 Peptidase_M22 domain has been found. There are 39 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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