background:
ASNA1 is the human homolog of the E.coli arsA gene which is an ATPase, and is the catalytic component of a multisubunit oxyanion pump responsible for resistance to arsenicals and antimonials.
Function:
This gene represents the human homolog of the bacterialarsA gene, encoding the arsenite-stimulated ATPase component of thearsenite transporter responsible for resistance to arsenicals. Thisprotein is also a central component of a transmembrane domain (TMD)recognition complex (TRC) that is involved in thepost-translational delivery of tail-anchored (TA) proteins from thecytosol to the endoplasmic reticulum (ER). It recognizes andselectively binds the TMD of TA proteins in the cytosol, anddelivers them to the ER for insertion. [provided by RefSeq, Oct2011].
[FUNCTION] ATPase required for the post-translational delivery oftail-anchored (TA) proteins to the endoplasmic reticulum.Recognizes and selectively binds the transmembrane domain of TAproteins in the cytosol. This complex then targets to theendoplasmic reticulum by membrane-bound receptors, where thetail-anchored protein is released for insertion. This process isregulated by ATP binding and hydrolysis. ATP binding drives thehomodimer towards the closed dimer state, facilitating recognitionof newly synthesized TA membrane proteins. ATP hydrolysis isrequired for insertion. Subsequently, the homodimer reverts towardsthe open dimer state, lowering its affinity for the membrane-boundreceptor, and returning it to the cytosol to initiate a new roundof targeting (By similarity). May be involved in insulin signaling.
Subunit:
Homodimer (By similarity). Component of a transmembranedomain recognition complex (TRC) (By similarity). Interacts withSERP1 and SEC61B (By similarity). Interacts with WRB.
Subcellular Location:
Cytoplasm. Endoplasmic reticulum. Nucleus,nucleolus.
Tissue Specificity:
Expressed in the epithelial cells of theliver, kidney, and stomach wall, in the adrenal medulla, in theislet cells of the pancreas, in the red pulp of the spleen, and incardiac and skeletal muscle.
Similarity:
Belongs to the arsA ATPase family.
Database links:
Entrez Gene: 439 Human
Entrez Gene: 56495 Mouse
Entrez Gene: 288919 Rat
GenBank: NP_004308.2 Human
Omim: 601913 Human
SwissProt: O43681 Human
SwissProt: O54984 Mouse
Unigene: 465985 Human
Unigene: 41475 Mouse
Important Note:
This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications.
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