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Cysteine-rich secretory protein 3 is a ligand of alpha1B-glycoprotein in human plasma

Udby, Lene; Sørensen, Ole E LU ; Pass, Jesper; Johnsen, Anders H; Behrendt, Niels; Borregaard, Niels and Kjeldsen, Lars (2004) In Biochemistry 43(40). p.12877-12886
Abstract
Human cysteine-rich secretory protein 3 (CRISP-3; also known as SGP28) belongs to a family of closely related proteins found in mammals and reptiles. Some mammalian CRISPs are known to be involved in the process of reproduction, whereas some of the CRISPs from reptiles are neurotoxin-like substances found in lizard saliva or snake venom. Human CRISP-3 is present in exocrine secretions and in secretory granules of neutrophilic granulocytes and is believed to play a role in innate immunity. On the basis of the relatively high content of CRISP-3 in human plasma and the small size of the protein (28 kDa), we hypothesized that CRISP-3 in plasma was bound to another component. This was supported by size-exclusion chromatography and... (More)
Human cysteine-rich secretory protein 3 (CRISP-3; also known as SGP28) belongs to a family of closely related proteins found in mammals and reptiles. Some mammalian CRISPs are known to be involved in the process of reproduction, whereas some of the CRISPs from reptiles are neurotoxin-like substances found in lizard saliva or snake venom. Human CRISP-3 is present in exocrine secretions and in secretory granules of neutrophilic granulocytes and is believed to play a role in innate immunity. On the basis of the relatively high content of CRISP-3 in human plasma and the small size of the protein (28 kDa), we hypothesized that CRISP-3 in plasma was bound to another component. This was supported by size-exclusion chromatography and immunoprecipitation of plasma proteins. The binding partner was identified by mass spectrometry as alpha(1)B-glycoprotein (A1BG), which is a known plasma protein of unknown function and a member of the immunoglobulin superfamily. We demonstrate that CRISP-3 is a specific and high-affinity ligand of A1BG with a dissociation constant in the nanomolar range as evidenced by surface plasmon resonance. The A1BG-CRISP-3 complex is noncovalent with a 1:1 stoichiometry and is held together by strong electrostatic forces. Similar complexes have been described between toxins from snake venom and A1BG-like plasma proteins from opossum species. In these cases, complex formation inhibits the toxic effect of snake venom metalloproteinases or myotoxins and protects the animal from envenomation. We suggest that the A1BG-CRISP-3 complex displays a similar function in protecting the circulation from a potentially harmful effect of free CRISP-3. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
in
Biochemistry
volume
43
issue
40
pages
12877 - 12886
publisher
The American Chemical Society
external identifiers
  • pmid:15461460
  • scopus:4944250529
ISSN
0006-2960
DOI
10.1021/bi048823e
language
English
LU publication?
no
id
e11e8b2a-fad0-4d32-bd6f-605a26c7eadb (old id 1129080)
date added to LUP
2008-06-18 16:05:09
date last changed
2017-02-19 03:23:58
@article{e11e8b2a-fad0-4d32-bd6f-605a26c7eadb,
  abstract     = {Human cysteine-rich secretory protein 3 (CRISP-3; also known as SGP28) belongs to a family of closely related proteins found in mammals and reptiles. Some mammalian CRISPs are known to be involved in the process of reproduction, whereas some of the CRISPs from reptiles are neurotoxin-like substances found in lizard saliva or snake venom. Human CRISP-3 is present in exocrine secretions and in secretory granules of neutrophilic granulocytes and is believed to play a role in innate immunity. On the basis of the relatively high content of CRISP-3 in human plasma and the small size of the protein (28 kDa), we hypothesized that CRISP-3 in plasma was bound to another component. This was supported by size-exclusion chromatography and immunoprecipitation of plasma proteins. The binding partner was identified by mass spectrometry as alpha(1)B-glycoprotein (A1BG), which is a known plasma protein of unknown function and a member of the immunoglobulin superfamily. We demonstrate that CRISP-3 is a specific and high-affinity ligand of A1BG with a dissociation constant in the nanomolar range as evidenced by surface plasmon resonance. The A1BG-CRISP-3 complex is noncovalent with a 1:1 stoichiometry and is held together by strong electrostatic forces. Similar complexes have been described between toxins from snake venom and A1BG-like plasma proteins from opossum species. In these cases, complex formation inhibits the toxic effect of snake venom metalloproteinases or myotoxins and protects the animal from envenomation. We suggest that the A1BG-CRISP-3 complex displays a similar function in protecting the circulation from a potentially harmful effect of free CRISP-3.},
  author       = {Udby, Lene and Sørensen, Ole E and Pass, Jesper and Johnsen, Anders H and Behrendt, Niels and Borregaard, Niels and Kjeldsen, Lars},
  issn         = {0006-2960},
  language     = {eng},
  number       = {40},
  pages        = {12877--12886},
  publisher    = {The American Chemical Society},
  series       = {Biochemistry},
  title        = {Cysteine-rich secretory protein 3 is a ligand of alpha1B-glycoprotein in human plasma},
  url          = {http://dx.doi.org/10.1021/bi048823e},
  volume       = {43},
  year         = {2004},
}