Format

Send to

Choose Destination
Biochim Biophys Acta. 2010 Apr;1800(4):481-5. doi: 10.1016/j.bbagen.2010.01.011. Epub 2010 Jan 28.

Human CRISP-3 binds serum alpha(1)B-glycoprotein across species.

Author information

1
Granulocyte Research Laboratory, Department of Hematology, Copenhagen University Hospital, Rigshospitalet, Denmark. lene.udby@rh.regionh.dk

Abstract

BACKGROUND:

CRISP-3 was previously shown to be bound to alpha(1)B-glycoprotein (A1BG) in human serum/plasma. All mammalian sera are supposed to contain A1BG, although its presence in rodent sera is not well-documented. Since animal sera are often used to supplement buffers in experiments, in particular such that involve cell cultures, binding proteins present in sera might interfere in the experiments.

METHODS:

We examined sera from five different animal species for CRISP-3 binding proteins using gel filtration and ligand blotting. We developed a rapid method for isolation of proteins that bind to human CRISP-3 and identified the isolated proteins by mass spectrometry and N-terminal sequencing.

RESULTS:

We identified A1BG as a CRISP-3 binding protein in sera from cow, horse and rabbit. CRISP-3 bound kininogen 1 in mouse serum, whereas rat serum showed no CRISP-3 binding activity. In equine serum, we furthermore detected a possible CRISP, already bound to A1BG.

GENERAL SIGNIFICANCE:

It seems to be a common mechanism that A1BGs bind CRISPs, also across species. Apart from the possible physiological implications hereof, complex binding of CRISPs by A1BG (and other proteins) may interfere with the detection and function of CRISPs, when these are studied in the presence of animal sera.

PMID:
20116414
DOI:
10.1016/j.bbagen.2010.01.011
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center