Summary: WXG100 protein secretion system (Wss), protein EssA
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.
WXG100 protein secretion system (Wss), protein EssA Provide feedback
The WXG100 protein secretion system (Wss) is responsible for the secretion of WXG100 proteins (PF06013) such as ESAT-6 and CFP-10 in Mycobacterium tuberculosis or EsxA and EsxB in Staphylococcus aureus. In S. aureus, the Wss seems to be encoded by a locus of eight CDS, called ess (eSAT-6 secretion system). This locus encodes, amongst several other proteins, EssA, a protein predicted to possess one transmembrane domain. Due to its predicted membrane location and its absolute requirement for WXG100 protein secretion, it has been speculated that EssA could form a secretion apparatus in conjunction with the polytopic membrane protein EsaA, YukC (PF10140) and YukAB, which is a membrane-bound ATPase containing Ftsk/SpoIIIE domains (PF01580) called EssC in S. aureus and Snm1/Snm2 in Mycobacterium tuberculosis. Proteins homologous to EssA, YukC, EsaA and YukD seem absent from mycobacteria .
Burts ML, Williams WA, DeBord K, Missiakas DM; , Proc Natl Acad Sci U S A. 2005;102:1169-1174.: EsxA and EsxB are secreted by an ESAT-6-like system that is required for the pathogenesis of Staphylococcus aureus infections. PUBMED:15657139 EPMC:15657139
Desvaux M, Hebraud M, Talon R, Henderson IR;, Trends Microbiol. 2009;17:338-340.: Outer membrane translocation: numerical protein secretion nomenclature in question in mycobacteria. PUBMED:19674902 EPMC:19674902
Desvaux M, Hebraud M, Talon R, Henderson IR;, Trends Microbiol. 2009;17:139-145.: Secretion and subcellular localizations of bacterial proteins: a semantic awareness issue. PUBMED:19299134 EPMC:19299134
External database links
This tab holds annotation information from the InterPro database.
InterPro entry IPR018920
The WXG100 protein secretion system in Staphylococcus aureus seems to be encoded by a locus of eight ORFs, called ess (eSAT-6 secretion system) [PUBMED:15657139]. This locus encodes, amongst several other proteins, EssA, a protein predicted to possess one transmembrane domain. Due to its predicted membrane location and its absolute requirement for WXG100 protein secretion, it has been speculated that EssA could form a secretion apparatus in conjunction with YukC and YukAB. Proteins homologous to EssA, YukC, EsaA and YukD were absent from mycobacteria [PUBMED:16911044].
The WXG100 secretion system has also been called the type VII secretion system, though this nomenlature is disputed [PUBMED:20852931].
- the number of sequences which exhibit this architecture
a textual description of the architecture, e.g. Gla, EGF x 2, Trypsin.
This example describes an architecture with one
Gladomain, followed by two consecutive
EGFdomains, and finally a single
- the UniProt description of the protein sequence
- the number of residues in the sequence
- the Pfam graphic itself.
Loading domain graphics...
We make a range of alignments for each Pfam-A family:
- the curated alignment from which the HMM for the family is built
- the alignment generated by searching the sequence database using the HMM
- Representative Proteomes (RPs) at 15%, 35%, 55% and 75% co-membership thresholds
- alignment generated by searching the NCBI sequence database using the family HMM
- alignment generated by searching the metagenomics sequence database using the family HMM
You can see the alignments as HTML or in three different sequence viewers:
- Pfam viewer
- an HTML-based viewer that uses DAS to retrieve alignment fragments on request
1Cannot generate PP/Heatmap alignments for seeds; no PP data available
Key: available, not generated, — not available.
Format an alignment
If you find these logos useful in your own work, please consider citing the following article:
Note: You can also download the data file for the tree.
Curation and family details
|Seed source:||FIG043089 (Release 2.0)|
|Author:||FIGfam, Mistry J, Coggill P, Desvaux M|
|Number in seed:||4|
|Number in full:||267|
|Average length of the domain:||130.50 aa|
|Average identity of full alignment:||47 %|
|Average coverage of the sequence by the domain:||86.05 %|
|HMM build commands:||
build method: hmmbuild --amino -o /dev/null HMM SEED
search method: hmmsearch -Z 23193494 -E 1000 --cpu 4 HMM pfamseq
|Family (HMM) version:||4|
|Download:||download the raw HMM for this family|
Weight segments by...
Change the size of the sunburst
selected sequences to HMM
a FASTA-format file
- 0 sequences
- 0 species
How the sunburst is generated
Colouring and labels
Anomalies in the taxonomy tree
Missing taxonomic levels
Unmapped species names
Too many species/sequences
The tree shows the occurrence of this domain across different species. More...
You can use the tree controls to manipulate how the interactive tree is displayed:
- show/hide the summary boxes
- highlight species that are represented in the seed alignment
- expand/collapse the tree or expand it to a given depth
- select a sub-tree or a set of species within the tree and view them graphically or as an alignment
- save a plain text representation of the tree