Anti-SSR3 antibody produced in rabbit

Prestige Antibodies® Powered by Atlas Antibodies, affinity isolated antibody, buffered aqueous glycerol solution

Anti-TRAP-gamma, Anti-Signal sequence receptor subunit gamma, Anti-Translocon-associated protein subunit gamma, Anti-SSR-gamma
Human Protein Atlas Number:
Pricing and availability is not currently available.

biological source


Quality Level

antibody form

affinity isolated antibody

antibody product type

primary antibodies



product line

Prestige Antibodies® Powered by Atlas Antibodies


buffered aqueous glycerol solution

species reactivity

mouse, human, rat


antibody small pack of 25 μL


immunoblotting: 0.04-0.4 μg/mL
immunohistochemistry: 1:200-1:500

immunogen sequence




UniProt accession no.

shipped in

wet ice

storage temp.


Gene Information

human ... SSR3(6747)

General description

SSR3 (signal sequence receptor, gamma) is also called TRAP (translocon-associated protein)γ, and forms a subunit of the TRAP complex, which also includes α, β and δ subunits. This subunit has a molecular weight of 20kDa. This complex is present in ER (endoplasmic membrane) membrane, and SSR3 has four membrane spanning domains. It interacts with the other subunits of TRAP complex, with its charged domain present between the first two and the last two transmembrane segments.


Translocon-associated protein subunit gamma recombinant protein epitope signature tag (PrEST)


All Prestige Antibodies Powered by Atlas Antibodies are developed and validated by the Human Protein Atlas (HPA) project (www.proteinatlas.org)and as a result, are supported by the most extensive characterization in the industry.

The Human Protein Atlas project can be subdivided into three efforts: Human Tissue Atlas, Cancer Atlas, and Human Cell Atlas. The antibodies that have been generated in support of the Tissue and Cancer Atlas projects have been tested by immunohistochemistry against hundreds of normal and disease tissues and through the recent efforts of the Human Cell Atlas project, many have been characterized by immunofluorescence to map the human proteome not only at the tissue level but now at the subcellular level. These images and the collection of this vast data set can be viewed on the Human Protein Atlas (HPA) site by clicking on the Image Gallery link. To view these protocols and other useful information about Prestige Antibodies and the HPA, visit sigma.com/prestige.

Biochem/physiol Actions

SSR3 (signal sequence receptor, γ) is a subunit of TRAP (translocon-associated protein) complex, which is responsible for translocation of membrane proteins from the ER (endoplasmic reticulum) to the plasma membrane. It is thought to be a functional part of the translocon, and interacts with Sec61 to form a heterotetramer. It also regulates the post-translational modifications of the translocating proteins. The TRAP complex might also play a role in the unfolded protein response (UPR) pathway. Studies in mice show that SSR3 is essential for the formation of vascular network in mice palcenta. It is an interacting partner of the orphan nuclear receptor TR3, and interacts through its C-terminal with the ligand-binding domain of TR3. This interaction mediates ER-stress, as well as induces apoptosis.

Features and Benefits

Prestige Antibodies® are highly characterized and extensively validated antibodies with the added benefit of all available characterization data for each target being accessible via the Human Protein Atlas portal linked just below the product name at the top of this page. The uniqueness and low cross-reactivity of the Prestige Antibodies® to other proteins are due to a thorough selection of antigen regions, affinity purification, and stringent selection. Prestige antigen controls are available for every corresponding Prestige Antibody and can be found in the linkage section.

Every Prestige Antibody is tested in the following ways:
  • IHC tissue array of 44 normal human tissues and 20 of the most common cancer type tissues.
  • Protein array of 364 human recombinant protein fragments.


Corresponding Antigen APREST73105.

Physical form

Solution in phosphate-buffered saline, pH 7.2, containing 40% glycerol and 0.02% sodium azide

Legal Information

Prestige Antibodies is a registered trademark of Sigma-Aldrich Co. LLC


Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves


NONH for all modes of transport

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis
Certificate of Origin
Hang-zi Chen et al.
The international journal of biochemistry & cell biology, 45(8), 1600-1609 (2013-05-11)
The orphan nuclear receptor TR3 (also known as Nur77) belongs to the steroid/thyroid/retinoid nuclear receptor superfamily and plays important roles in regulating cell proliferation, differentiation and apoptosis. No physiological ligand for TR3 has been found thus far; the determination of...
L Wang et al.
FEBS letters, 457(3), 316-322 (1999-09-03)
Proteins involved in protein translocation across the membrane of the endoplasmic reticulum assemble into different oligomeric complexes depending on their state of function. To analyse such membrane protein complexes we fractionated proteins of mammalian rough microsomes and analysed them using...
Yasuka L Yamaguchi et al.
Developmental dynamics : an official publication of the American Association of Anatomists, 240(2), 394-403 (2011-01-20)
The translocon-associated protein (TRAP, also termed the signal sequence receptor) complex is required for the efficient translocation of secretory and membrane proteins in the endoplasmic reticulum, and is also involved in the endoplasmic reticulum stress-mediated unfolded protein response pathway. To...
E Hartmann et al.
European journal of biochemistry, 214(2), 375-381 (1993-06-01)
The translocation site (translocon), at which nascent polypeptides pass through the endoplasmic reticulum membrane, contains a component previously called 'signal sequence receptor' that is now renamed as 'translocon-associated protein' (TRAP). Two glycosylated subunits of the TRAP complex have been identified...

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