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12  structures 2089  species 0  interactions 2801  sequences 17  architectures

Family: SLAC1 (PF03595)

Summary: Voltage-dependent anion channel

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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.

Voltage-dependent anion channel Provide feedback

This family of transporters has ten alpha helical transmembrane segments [1]. The structure of a bacterial homologue of SLAC1 shows it to have a trimeric arrangement. The pore is composed of five helices with a conserved Phe residue involved in gating. One homologue, Mae1 from the yeast Schizosaccharomyces pombe, functions as a malate uptake transporter; another, Ssu1 from Saccharomyces cerevisiae and other fungi including Aspergillus fumigatus, is characterised as a sulfite efflux pump; and TehA from Escherichia coli is identified as a tellurite resistance protein by virtue of its association in the tehA/tehB operon. In plants, this family is found in the stomatal guard cells functioning as an anion-transporting pore [2]. Many homologues are incorrectly annotated as tellurite resistance or dicarboxylate transporter (TDT) proteins.

Literature references

  1. Chen YH, Hu L, Punta M, Bruni R, Hillerich B, Kloss B, Rost B, Love J, Siegelbaum SA, Hendrickson WA;, Nature. 2010;467:1074-1080.: Homologue structure of the SLAC1 anion channel for closing stomata in leaves. PUBMED:20981093 EPMC:20981093

  2. Vahisalu T, Kollist H, Wang YF, Nishimura N, Chan WY, Valerio G, Lamminmaki A, Brosche M, Moldau H, Desikan R, Schroeder JI, Kangasjarvi J;, Nature. 2008;452:487-491.: SLAC1 is required for plant guard cell S-type anion channel function in stomatal signalling. PUBMED:18305484 EPMC:18305484


External database links

This tab holds annotation information from the InterPro database.

InterPro entry IPR004695

Two members of the Tellurite-Resistance/Dicarboxylate Transporter (TDT) family have been functionally characterised. One is the TehA protein of Escherichia coli which has been implicated in resistance to tellurite; the other is the Mae1 protein of Schizosaccharomyces pombe which functions in the uptake of malate and other dicarboxylates by a proton symport mechanism. These proteins exhibit 10 putative transmembrane a-helical spanners (TMSs).

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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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...

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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
(159)
Full
(2801)
Representative proteomes NCBI
(2007)
Meta
(101)
RP15
(203)
RP35
(426)
RP55
(638)
RP75
(789)
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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
(159)
Full
(2801)
Representative proteomes NCBI
(2007)
Meta
(101)
RP15
(203)
RP35
(426)
RP55
(638)
RP75
(789)
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
(159)
Full
(2801)
Representative proteomes NCBI
(2007)
Meta
(101)
RP15
(203)
RP35
(426)
RP55
(638)
RP75
(789)
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: TIGRFAMs
Previous IDs: C4dic_mal_tran;
Type: Family
Author: TIGRFAMs, Griffiths-Jones SR, Bateman A
Number in seed: 159
Number in full: 2801
Average length of the domain: 296.00 aa
Average identity of full alignment: 22 %
Average coverage of the sequence by the domain: 86.74 %

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 26.2 26.2
Trusted cut-off 26.9 26.4
Noise cut-off 26.1 26.1
Model length: 330
Family (HMM) version: 12
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 SLAC1 domain has been found. There are 12 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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