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Preprotein translocase SecE subunit superfamily

SCOP classification
Root:   SCOP hierarchy in SUPERFAMILY [ 0] (11)
Class:   Membrane and cell surface proteins and peptides [ 56835] (58)
Fold:   Single transmembrane helix [ 81407] (38)
Superfamily:   Preprotein translocase SecE subunit [ 103456]
Families:   Preprotein translocase SecE subunit [ 103457]


Superfamily statistics
Genomes (618) Uniprot 2018_03 genome PDB chains (SCOP 1.75)
Domains 808 2,618 2
Proteins 808 2,618 2


Functional annotation
General category Processes_IC
Detailed category Transport

Document:
Function annotation of SCOP domain superfamilies

Arabidopsis Plant Ontology (AP)

(show details)
AP termFDR (all)SDAP levelAnnotation (direct or inherited)
Plant ANatomical entity (PAN)flower0Least InformativeDirect
Plant ANatomical entity (PAN)portion of meristem tissue0Least InformativeDirect
Plant ANatomical entity (PAN)whole plant0Least InformativeDirect
Plant ANatomical entity (PAN)collective phyllome structure0Least InformativeDirect
Plant ANatomical entity (PAN)megasporophyll0Least InformativeDirect
Plant ANatomical entity (PAN)cardinal part of multi-tissue plant structure0Least InformativeDirect
Plant ANatomical entity (PAN)guard cell0Least InformativeDirect
Plant ANatomical entity (PAN)leaf0Least InformativeDirect
Plant ANatomical entity (PAN)microsporophyll0Least InformativeDirect
Plant ANatomical entity (PAN)root system0Least InformativeDirect
Plant ANatomical entity (PAN)inflorescence0Least InformativeDirect
Plant ANatomical entity (PAN)seed0Least InformativeDirect
Plant ANatomical entity (PAN)sporangium0Least InformativeDirect
Plant ANatomical entity (PAN)shoot axis0Least InformativeDirect
Plant ANatomical entity (PAN)inflorescence meristem0Moderately InformativeDirect
Plant ANatomical entity (PAN)cotyledon0Moderately InformativeDirect
Plant ANatomical entity (PAN)pollen0Moderately InformativeDirect
Plant ANatomical entity (PAN)pollen tube cell0InformativeDirect
Plant structure DEvelopment stage (PDE)LP.04 four leaves visible stage0Least InformativeDirect
Plant structure DEvelopment stage (PDE)4 leaf senescence stage0Least InformativeDirect
Plant structure DEvelopment stage (PDE)D bilateral stage0Least InformativeDirect
Plant structure DEvelopment stage (PDE)LP.12 twelve leaves visible stage0Least InformativeDirect
Plant structure DEvelopment stage (PDE)LP.06 six leaves visible stage0Least InformativeDirect
Plant structure DEvelopment stage (PDE)F mature embryo stage0Least InformativeDirect
Plant structure DEvelopment stage (PDE)LP.08 eight leaves visible stage0Least InformativeDirect
Plant structure DEvelopment stage (PDE)LP.02 two leaves visible stage0Least InformativeDirect
Plant structure DEvelopment stage (PDE)E expanded cotyledon stage0Least InformativeDirect
Plant structure DEvelopment stage (PDE)C globular stage0Least InformativeDirect
Plant structure DEvelopment stage (PDE)LP.10 ten leaves visible stage0Least InformativeDirect
Plant structure DEvelopment stage (PDE)pollen development stage0Moderately InformativeDirect
Plant structure DEvelopment stage (PDE)L mature pollen stage0InformativeDirect
Plant structure DEvelopment stage (PDE)M germinated pollen stage0InformativeDirect

Document: AP annotation of SCOP domains

InterPro annotation
Cross references IPR008158 SSF103456 Protein matches
Abstract

This family is the protein translocase SEC61 complex gamma subunit of the archaeal and eukaryotic type. It does not hit bacterial SecE proteins. Sec61 is required for protein translocation in the endoplasmic reticulum.

The Sec61 complex (eukaryotes) or SecY complex (prokaryotes) forms a conserved heterotrimeric integral membrane protein complex and forms a protein-conducting channel that allows polypeptides to be transferred across (or integrated into) the endoplasmic reticulum (eukaryotes) or across the cytoplasmic membrane (prokaryotes) [PubMed14661030, PubMed11597451]. This complex is itself a part of a larger translocase heterotrimeric complex composed of alpha, beta and gamma subunits.

The channel is a passive conduit for polypeptides. It therefore has to associate with other components that provide a driving force. The partner proteins in bacteria and eukaryotes differ. In bacteria, the translocase complex comprises 7 proteins [PubMed14661030], including a chaperone protein (SecB) an ATPase (SecA), an integral membrane complex (SecY, SecE and SecG), and two additional membrane proteins that promote the release of the mature peptide into the periplasm (SecD) and SecF. The SecA ATPase interacts dynamically with the SecYEG integral membrane components to drive the transmembrane movement of newly synthesized preproteins [PubMed11597451]. In yeast (and probably in all eukaryotes), the full translocase comprises another membrane protein subcomplex (the tetrameric Sec62/63p complex), and the lumenal protein BiP, a member of the Hsp70 family of ATPases. BiP promotes translocation by acting as a molecular ratchet, preventing the polypeptide chain from sliding back into the cytosol [PubMed14661030].


InterPro database


PDBeMotif information about ligands, sequence and structure motifs
Cross references PDB entries
Ligand binding statistics
Nucleic-acid binding statistics
Occurrence of secondary structure elements
Occurrence of small 3D structural motifs

PDBeMotif resource

Jump to [ Top of page · SCOP classification · InterPro annotation · PDBeMotif links · Functional annotation · Arabidopsis Plant Ontology (AP) ]

Internal database links

Browse genome assignments for this superfamily. The SUPERFAMILY hidden Markov model library has been used to carry out SCOP domain assignments to all genomes at the superfamily level.


Alignments of sequences to 2 models in this superfamily are available by clicking on the 'Alignments' icon above. PDB sequences less than 40% identical are shown by default, but any other sequence(s) may be aligned. Select PDB sequences, genome sequences, or paste in or upload your own sequences.


Browse and view proteins in genomes which have different domain combinations including a Preprotein translocase SecE subunit domain.


Examine the distribution of domain superfamilies, or families, across the major taxonomic kingdoms or genomes within a kingdom. This gives an immediate impression of how superfamilies, or families, are restricted to certain kingdoms of life.


Explore domain occurrence network where nodes represent genomes and edges are domain architectures (shared between genomes) containing the superfamily of interest.

There are 2 hidden Markov models representing the Preprotein translocase SecE subunit superfamily. Information on how the models are built, and plots showing hydrophobicity, match emmission probabilities and insertion/deletion probabilities can be inspected.


Jump to [ Top of page · SCOP classification · InterPro annotation · PDBeMotif links · Functional annotation · Arabidopsis Plant Ontology (AP) · Internal database links ]