Format

Send to:

Choose Destination
See comment in PubMed Commons below
J Biol Chem. 2001 May 4;276(18):14665-74. Epub 2001 Jan 30.

Biochemical and pharmacological criteria define two shedding activities for TRANCE/OPGL that are distinct from the tumor necrosis factor alpha convertase.

Author information

  • 1Cellular Biochemistry and Biophysics Program, Sloan-Kettering Institute, Memorial Sloan-Kettering Cancer Center, New York, New York 10021, USA.

Abstract

A number of structurally and functionally diverse membrane proteins are released from the plasma membrane in a process termed protein ectodomain shedding. Ectodomain shedding may activate or inactivate a substrate or change its properties, such as converting a juxtacrine into a paracrine signaling molecule. Here we have characterized the activities involved in protein ectodomain shedding of the tumor necrosis factor family member TRANCE/OPGL in different cell types. The criteria used to evaluate these activities include (a) cleavage site usage, (b) response to activators and inhibitors of intracellular signaling pathways, and (c) sensitivity to tissue inhibitors of metalloproteases (TIMPs). At least two TRANCE shedding activities emerged, both of which are distinct from the tumor necrosis factor alpha convertase. One of the TRANCE sheddases is induced by the tyrosine phosphatase inhibitor pervanadate but not by phorbol esters, whereas the other is refractory to both of these stimuli. Furthermore, the pervanadate-regulated sheddase activity is sensitive to TIMP-2 but not TIMP-1, which is consistent with the properties of a membrane type matrix metalloprotease. This study provides insights into the properties of different activities involved in protein ectodomain shedding and has implications for the functional regulation of TRANCE by potentially more than one protease.

PMID:
11278735
[PubMed - indexed for MEDLINE]
Free full text
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for HighWire
    Loading ...
    Write to the Help Desk