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Mouse Anti-PSMB8 Recombinant Antibody (1G7) (CBMAB-A7131-LY)


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Summary

Host Animal
Mouse
Specificity
Human
Clone
1G7
Antibody Isotype
IgG2a, κ
Application
WB, ELISA

Basic Information

Immunogen
PSMB8 (AAH01114, 173 a.a. ~ 272 a.a) partial recombinant protein with GST tag. MW of the GST tag alone is 26 KDa.
Specificity
Human
Antibody Isotype
IgG2a, κ
Clonality
Monoclonal
Application Notes
The COA includes recommended starting dilutions, optimal dilutions should be determined by the end user.

Formulations & Storage [For reference only, actual COA shall prevail!]

Format
Liquid
Purity
> 95% Purity determined by SDS-PAGE.
Storage
Store at +4°C short term (1-2 weeks). Aliquot and store at -20°C long term. Avoid repeated freezethaw cycles.

Target

Full Name
proteasome (prosome, macropain) subunit, beta type, 8 (large multifunctional peptidase 7)
Introduction
The proteasome is a multicatalytic proteinase complex with a highly ordered ring-shaped 20S core structure. The core structure is composed of 4 rings of 28 non-identical subunits; 2 rings are composed of 7 alpha subunits and 2 rings are composed of 7 beta subunits. Proteasomes are distributed throughout eukaryotic cells at a high concentration and cleave peptides in an ATP/ubiquitin-dependent process in a non-lysosomal pathway. An essential function of a modified proteasome, the immunoproteasome, is the processing of class I MHC peptides. This gene encodes a member of the proteasome B-type family, also known as the T1B family, that is a 20S core beta subunit. This gene is located in the class II region of the MHC (major histocompatibility complex). Expression of this gene is induced by gamma interferon and this gene product replaces catalytic subunit 3 (proteasome beta 5 subunit) in the immunoproteasome. Proteolytic processing is required to generate a mature subunit. Two alternative transcripts encoding two isoforms have been identified; both isoforms are processed to yield the same mature subunit. [provided by RefSeq]
Entrez Gene ID
5696
UniProt ID
P28062
Alternative Names
D6S216; D6S216E; LMP7; MGC1491; PSMB5i; RING10; beta5i
Function
The proteasome is a multicatalytic proteinase complex which is characterized by its ability to cleave peptides with Arg, Phe, Tyr, Leu, and Glu adjacent to the leaving group at neutral or slightly basic pH. The proteasome has an ATP-dependent proteolytic activity. This subunit is involved in antigen processing to generate class I binding peptides. Replacement of PSMB5 by PSMB8 increases the capacity of the immunoproteasome to cleave model peptides after hydrophobic and basic residues. Involved in the generation of spliced peptides resulting from the ligation of two separate proteasomal cleavage products that are not contiguous in the parental protein (PubMed:27049119).
Acts as a major component of interferon gamma-induced sensitivity. Plays a key role in apoptosis via the degradation of the apoptotic inhibitor MCL1. May be involved in the inflammatory response pathway. In cancer cells, substitution of isoform 1 (E2) by isoform 2 (E1) results in immunoproteasome deficiency. Required for the differentiation of preadipocytes into adipocytes.
Biological Process
Antigen processing and presentationIEA:Ensembl
Fat cell differentiationManual Assertion Based On ExperimentIMP:UniProtKB
Proteasomal protein catabolic processManual Assertion Based On ExperimentIBA:GO_Central
Regulation of endopeptidase activityManual Assertion Based On ExperimentIMP:UniProtKB
Cellular Location
Cytoplasm
Nucleus
Involvement in disease
Proteasome-associated autoinflammatory syndrome 1 (PRAAS1):
An autosomal recessive autoinflammatory disorder characterized by early childhood onset of recurrent fever, joint stiffness and severe contractures of the hands and feet, and erythematous skin lesions with subsequent development of lipodystrophy and laboratory evidence of immune dysregulation. Accompanying features may include muscle weakness and atrophy, hepatosplenomegaly, and microcytic anemia.
PTM
Autocleaved. The resulting N-terminal Thr residue of the mature subunit is responsible for the nucleophile proteolytic activity.
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For research use only. Not intended for any clinical use.

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