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Proteomic analysis of normal human urinary proteins isolated by acetone precipitation or ultracentrifugation.

Abstract：

BACKGROUND:Proteomic techniques have recently become available for large-scale protein analysis. The utility of these techniques in identification of urinary proteins is poorly defined. We constructed a proteome map of normal human urine as a reference protein database by using two differential fractionated techniques to isolate the proteins. METHODS:Proteins were isolated from urine obtained from normal human volunteers by acetone precipitation or ultracentrifugation, separated by two-dimensional polyacrylamide gel electrophoresis (2D-PAGE) and identified by matrix-assisted laser desorption ionization-time-of-flight (MALDI-TOF) mass spectrometry followed by peptide mass fingerprinting. RESULTS:A total of 67 protein forms of 47 unique proteins were identified, including transporters, adhesion molecules, complement, chaperones, receptors, enzymes, serpins, cell signaling proteins and matrix proteins. Acetone precipitated more acidic and hydrophilic proteins, whereas ultracentrifugation fractionated more basic, hydrophobic, and membrane proteins. Bioinformatic analysis predicted glycosylation to be the most common explanation for multiple forms of the same protein. CONCLUSIONS:Combining two differential isolation techniques magnified protein identification from human urine. Proteomic analysis of urinary proteins is a promising tool to study renal physiology and pathophysiology and to determine biomarkers of renal disease.

journal_name

Kidney Int

journal_title

Kidney international

authors

Thongboonkerd V,McLeish KR,Arthur JM,Klein JB

doi

10.1111/j.1523-1755.2002.kid565.x

subject

Has Abstract

pub_date

2002-10-01 00:00:00

pages

1461-9

issue

4

eissn

0085-2538

issn

1523-1755

pii

S0085-2538(15)48692-2

journal_volume

62

pub_type

杂志文章

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