Recombinant Human S5a/Angiocidin Biotin Protein, CF

    
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Preparation and Storage
  • Shipping
    The product is shipped with dry ice or equivalent. Upon receipt, store it immediately at the temperature recommended below.
  • Stability & Storage
    Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
    • 12 months from date of receipt, -70 °C as supplied.
    • 3 months, -70 °C under sterile conditions after opening.
Background: S5a/Angiocidin

S5a/Angiocidin, also known as Anti-secretory Factor (ASF), is classified under the gene PSMD4, but is often referred to by a different name depending on the context in which it is described. S5a and ASF have identical 377 amino acid (aa) sequences, while Angiocidin is described as having an additional Gly255Glu256Arg257 sequence in its C-Terminus (1-3). The human protein shares 96% and 99% aa sequence identity with its mouse and rat orthologs, respectively. Structurally, it contains an N-terminal von Willebrand Factor type A domain and two C-terminal Ubiquitin-interacting motifs (UIM). It acts as a Ubiquitin-binding protein where it is most commonly referred to as S5a or in yeast as Rpn10. It is part of the 19S regulatory subunit of the 26S Proteasome where its UIM recognizes poly-ubiquitinated proteins destined for degradation (4). As a part of the proteasome complex, it may also recognize the Ubiquitin-like modifier FAT10 (5). Free cytoplasmic forms also exist where its ubiquitination is catalyzed by a range of Ubiquitin E3 ligases from different classes. Therefore, experimentally S5a/Angiocidin may act as a useful substrate to monitor the activity of (E3) ligases, independent of their specific mechanisms of action (6). In cancer biology, where it is often referred to as Angiocidin, it is shown to slow tumor progression. It is found in the extracellular matrix of certain tumor subtypes, and it may act by suppressing angiogenesis or by directly inhibiting tumor cell growth (7,8). It also is found in several biological fluids where it is known primarily as ASF. It suppresses fluid secretion in response to enterotoxin and may act as an anti-inflammatory factor (9-11).

 

This protein recognizes ubiquitin chains and ubiquitin protein conjugates via two UIM (ubiquitin-interacting motif) domains. Detection with avidin-linked reagents allows for a higher efficiency and detection sensitivity than with other antibodies.

  • Long Name:
    26S Proteasome Regulatory Subunit S5a
  • Entrez Gene IDs:
    5710 (Human); 19185 (Mouse); 83499 (Rat)
  • Alternate Names:
    Angiocidin; ASF; Macropain; Mcb1; PSMD4; pUB-R5; Rpn10 ; S5a
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Staining Reagents
Description Application Cat# Citations Images  

Streptavidin-Alkaline Phosphatase

ELISA(Det) AR001 4
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Streptavidin-Phycoerythrin

Flow F0040 7
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NorthernLights Streptavidin NL557

Flow , IHC , ICC NL999 4
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Streptavidin-Allophycocyanin

Flow F0050 1
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NorthernLights Streptavidin NL637

Flow , IHC , ICC NL998 2
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NorthernLights Streptavidin NL493

Flow , IHC , ICC NL997 2
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Avidin-Fluorescein

Flow F0030 1
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Supplemental Cell Selection Products
Description Application Cat# Citations Images  

MagCellect Streptavidin Ferrofluid

MAG999 4
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MagCellect Streptavidin Ferrofluid

MAG999B 4
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Supplemental ELISA Products
Description Application Cat# Citations Images  

Streptavidin-HRP

ELISA DY998 51  
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EvenCoat Streptavidin Coated Plates

ELISA CP004
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EvenCoat Streptavidin Coated Plates, 5 Pack

ELISA CP003 3
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