Determination of the cross-linked residues in homo-dimerization of S19 ribosomal protein concomitant with exhibition of monocyte chemotactic activity

Citation
H. Nishiura et al., Determination of the cross-linked residues in homo-dimerization of S19 ribosomal protein concomitant with exhibition of monocyte chemotactic activity, LAB INV, 79(8), 1999, pp. 915-923
Citations number
13
Categorie Soggetti
Medical Research General Topics
Journal title
LABORATORY INVESTIGATION
ISSN journal
00236837 → ACNP
Volume
79
Issue
8
Year of publication
1999
Pages
915 - 923
Database
ISI
SICI code
0023-6837(199908)79:8<915:DOTCRI>2.0.ZU;2-8
Abstract
When S19 ribosomal protein molecules are intermolecularly cross-linked by a transglutaminase-catalyzed reaction, the monocyte chemotactic activity is newly expressed. Heparin, at a concentration of 1 U/ml, greatly augmented t he cross-linking reaction. This augmentation was due to binding affinity of S19 ribosomal protein to heparin. The major heparin-binding region of S19 ribosomal proteins was identified to Lys23-Lys-Ser-Gly-Lys-Leu-Lys29, using region-directed mutant proteins. The amino acid residues of S19 ribosomal protein used for the intermolecular cross-linkage were then determined by t he peptide map analysis with amino acid sequencing and by the site-directed mutagenesis; Gln137 and Lys122 were used in the intermolecular cross-linka ge.