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24  structures 327  species 5  interactions 1546  sequences 35  architectures

Family: Sec23_trunk (PF04811)

Summary: Sec23/Sec24 trunk domain

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Sec23/Sec24 trunk domain Provide feedback

COPII-coated vesicles carry proteins from the endoplasmic reticulum to the Golgi complex. This vesicular transport can be reconstituted by using three cytosolic components containing five proteins: the small GTPase Sar1p, the Sec23p/24p complex, and the Sec13p/Sec31p complex. This domain is known as the trunk domain and has an alpha/beta vWA fold and forms the dimer interface.

Literature references

  1. Lederkremer GZ, Cheng Y, Petre BM, Vogan E, Springer S, Schekman R, Walz T, Kirchhausen T; , Proc Natl Acad Sci USA 2001;98:10704-10709.: Structure of the Sec23p/24p and Sec13p/31p complexes of COPII. PUBMED:11535824 EPMC:11535824


Internal database links

External database links

This tab holds annotation information from the InterPro database.

InterPro entry IPR006896

COPII (coat protein complex II)-coated vesicles carry proteins from the endoplasmic reticulum (ER) to the Golgi complex [PUBMED:11535824]. COPII-coated vesicles form on the ER by the stepwise recruitment of three cytosolic components: Sar1-GTP to initiate coat formation, Sec23/24 heterodimer to select SNARE and cargo molecules, and Sec13/31 to induce coat polymerisation and membrane deformation [PUBMED:12239560].

Sec23 p and Sec24p are structurally related, folding into five distinct domains: a beta-barrel, a zinc-finger (INTERPRO), an alpha/beta trunk domain, an all-helical region (INTERPRO), and a C-terminal gelsolin-like domain (INTERPRO). This entry describes the Sec23/24 alpha/beta trunk domain, which is formed from a single, approximately 250-residue segment plugged into the beta-barrel between strands beta-1 and beta-19. The trunk has an alpha/beta fold with a vWA topology, and it forms the dimer interface, primarily involving strand beta-14 on Sec23 and Sec24; in addition, the trunk domain of Sec23 contacts Sar1.

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 vWA-like (CL0128), which has the following description:

To add.

The clan contains the following 16 members:

CobT_C Copine DUF1194 DUF2201 DUF444 DUF58 Ku_N Med25_VWA Sec23_trunk Ssl1 Tfb4 VWA vWA-TerF-like VWA_2 VWA_3 VWA_CoxE

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
(22)
Full
(1546)
Representative proteomes NCBI
(1513)
Meta
(23)
RP15
(340)
RP35
(560)
RP55
(837)
RP75
(1024)
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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
(22)
Full
(1546)
Representative proteomes NCBI
(1513)
Meta
(23)
RP15
(340)
RP35
(560)
RP55
(837)
RP75
(1024)
Alignment:
Format:
Order:
Sequence:
Gaps:
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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
(22)
Full
(1546)
Representative proteomes NCBI
(1513)
Meta
(23)
RP15
(340)
RP35
(560)
RP55
(837)
RP75
(1024)
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: 22
Number in full: 1546
Average length of the domain: 236.50 aa
Average identity of full alignment: 26 %
Average coverage of the sequence by the domain: 28.15 %

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 21.2 21.2
Trusted cut-off 21.2 22.1
Noise cut-off 21.0 21.0
Model length: 243
Family (HMM) version: 10
Download: download the raw HMM for this family

Species distribution

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Interactions

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

Gelsolin Sec23_helical Sec23_trunk Sec23_BS Arf

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 Sec23_trunk domain has been found. There are 24 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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