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Zn-alpha2-glycoprotein (ZAG) is a soluble protein that is present in serum and other body fluids. ZAG stimulates lipid degradation in adipocytes and causes the extensive fat losses associated with some advanced cancers. The 2.8 angstrom crystal structure of ZAG resembles a class I major histocompatibility complex (MHC) heavy chain, but ZAG does not bind the(More)
A cDNA coding for a new human matrix metalloproteinase (MMP) has been cloned from a cDNA library derived from a breast tumor. The isolated cDNA contains an open reading frame coding for a polypeptide of 471 amino acids. The predicted protein sequence displays extensive similarity to the previously known MMPs and presents all the structural features(More)
Remodeling of fibrillar collagen in mouse tissues has been widely attributed to the activity of collagenase-3 (matrix metalloproteinase-13 (MMP-13)), the main collagenase identified in this species. This proposal has been largely based on the repeatedly unproductive attempts to detect the presence in murine tissues of interstitial collagenase (MMP-1), a(More)
Apolipoprotein D (apo D) is a glycoprotein involved in the human plasma lipid transport system and present at large amounts in cyst fluid from women with gross cystic disease of the breast. Apo D expression in breast carcinomas was examined by immunoperoxidase staining of a series of 163 tumors. A total of 60 (36.8%) tumors were negative for apo D(More)
An aspartic proteinase present in cyst fluid from women with gross cystic breast disease was purified by a procedure involving affinity chromatography on pepstatin-agarose and size-exclusion high performance liquid chromatography. The amino-terminal sequence of the purified breast proteinase was identical to that corresponding to gastric pepsinogen C.(More)
We have examined by immunohistochemistry the ability of breast carcinomas to produce pepsinogen C, an aspartyl proteinase usually involved in the digestion of proteins in the stomach. A total of 113 out of 245 breast tumours (46%) were positive for pepsinogen C immunostaining. There was a significant association between pepsinogen C and oestrogen receptors(More)
A cDNA encoding a novel member of the cysteine proteinase family of proteins has been cloned from a human breast carcinoma cDNA library, by using a polymerase chain reaction-based cloning strategy. The isolated cDNA contains an open reading frame coding for a polypeptide of 321 amino acids that has been tentatively called cathepsin O. This protein presents(More)
Proteolytic enzymes play an essential role in different physiological processes, including development, reproduction and host defence, as well as in numerous pathologies, like inflammatory diseases, neurological disorders or cancer. The completion of the human genome sequence allowed us to determine that more than 2% of all human genes are proteases or(More)
Zinc alpha-2-glycoprotein (ZAG) is a M(r) 41,000 glycoprotein secreted by a variety of normal epithelia. ZAG was recently shown to stimulate lipolysis in adipocytes, leading to the development of cachexia in animals with ZAG-producing tumors. To understand the possible contribution of ZAG to the development of cachexia in men with prostate cancer, ZAG(More)
The tubulin folding pathway is a model system to understand protein folding in the cell. It involves the interaction of several chaperones, including TCP-1 and other as yet uncharacterized factors. Release of tubulin monomers from folding intermediates (C900 and C300) and their incorporation into tubulin dimers is dependent on GTP hydrolysis, magnesium ions(More)