A second protein marker of caveolae: caveolin-2.
- Author:
Liu-luan ZHU
1
;
Ying CUI
;
Yong-sheng CHANG
;
Fu-de FANG
Author Information
1. National Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100005, China.
- Publication Type:Journal Article
- MeSH:
Biomarkers;
metabolism;
Caveolae;
metabolism;
Caveolin 2;
genetics;
metabolism;
Chromosomes, Human, Pair 7;
Humans
- From:
Chinese Medical Sciences Journal
2010;25(2):119-124
- CountryChina
- Language:English
-
Abstract:
Caveolin-2, a protein about 20 kD, is a major component of the inner surface of caveolae, small invaginations of the plasma membrane. Similar with caveolin-1 and caveolin-3, it serves as a protein marker of caveolae. Caveolin-1 and -2 are located next to each other at 7q31.1 on human chromosome, the proteins encoded are co-localized and form a stable hetero-oligomeric complex, distributing similarly in tissue and cultured cells. Caveolin-3 is located on different chromosomes but confirmed to interact with caveolin-2. Caveolin-2 is similar to caveolin-1 in many respects but differs from the latter in functional domains, especially in G-protein binding domain and caveolin scaffolding domain. The mRNAs of both caveolin-1 and caveolin-2 are most abundantly expressed in white adipose tissue and are induced during differentiation of 3T3-L1 cells to adipocytes. Caveolin-2-deficient mice demonstrate clear pulmonary defects, with little or no change in caveolin-1 expression and caveolae formation, suggesting that caveolin-2 plays a selective role in lung functions. Caveolin-2 is also involved in lipid metabolism and human cancers.
