Crystal structure of the human vascular adhesion protein-1: Unique structural features with functional implications

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Airenne TT, Nymalm Y, Kidron H, Smith DJ, Pihlavisto M, Salmi M, Jalkanen S, Johnson MS, Salminen TA
Förläggare: COLD SPRING HARBOR LAB PRESS, PUBLICATIONS DEPT
Publiceringsår: 2005
Tidskrift: Protein Science
Tidskriftsakronym: PROTEIN SCI
Volym: 14
Nummer: 8
Artikelns första sida, sidnummer: 1964
Artikelns sista sida, sidnummer: 1974
Antal sidor: 11
ISSN: 0961-8368


Abstrakt

The expression of human vascular adhesion protein-1 (hVAP-1) is induced at sites of inflammation where extravasation of lymphocytes from blood to the peripheral tissue occurs. We have solved the X-ray structure of hVAP-1, a human copper amine oxidase (CAO), which is distinguished from other CAOs in being membrane-bound. The dimer structure reveals some intriguing features that may have fundamental roles in the adhesive and enzymatic functions of hVAP-1, especially regarding the role of hVAP-1 in inflammation, lymphocyte attachment, and signaling. Firstly, Leu469 at the substrate channel may play a key role in controlling the substrate entry; depending on its conformation, it either blocks or gives access to the active site. Secondly, sugar units are clearly observed at two of the six predicted N-glycosylation sites. Moreover, mutagenesis analysis showed that all of the predicted sites were glycosylated in the protein used for crystallization. Thirdly, the existence of a solvent-exposed RGD motif at the entrance to each active site in hVAP-1 suggests that it may have a functional role.


Nyckelord

amine oxidase, hVAP-1

Senast uppdaterad 2019-24-10 vid 03:20