balenine appears to be rather more abundant in marine mammals and certain reptilian species. Since the discovery of these compounds at the beginning of 20th century, numerous studies have been devoted to identification of the biochemical and physiological properties of carnosine and related dipeptides. These led to the discovery of the pHbuffering, metal-chelation and antioxidant, capabilities of carnosine
Sequence Identification and Characterization of Human Carnosinase and a Closely Related Non-specific Dipeptidase
作者:Michael Teufel、Vladimir Saudek、Jean-Pierre Ledig、Annie Bernhardt、Sylviane Boularand、Alexandra Carreau、Nigel J. Cairns、Christopher Carter、David J. Cowley、Danielle Duverger、Axel J. Ganzhorn、Chantal Guenet、Blanche Heintzelmann、Veronique Laucher、Claude Sauvage、Tatiana Smirnova
DOI:10.1074/jbc.m209764200
日期:2003.2
identification of two novel cDNAs named CN1 and CN2 coding for two proteins of 56.8 and 52.7 kDa and their classification as members of the M20 metalloprotease family. Whereas humanCN1 mRNA and protein are brain-specific, CN2 codes for a ubiquitous protein. In contrast, expression of the mouse and rat CN1 orthologues was detectable only in kidney. The recombinant CN1 and CN2 proteins were expressed in Chinese
Purification and properties of human serum carnosinase
作者:Mel C. Jackson、Christine M. Kucera、James F. Lenney
DOI:10.1016/0009-8981(91)90073-l
日期:1991.2
serum carnosinase was found to be a glycoprotein with a pI of 4.4 and a subunit Mr of 75,000; the active enzyme was a dimer, the two subunits being connected by one or more disulfide bonds. The enzyme was especially active in hydrolyzing carnosine and anserine, preferring dipeptides with histidine in the C-terminal position. In most human tissues, the concentration of serumcarnosinase was proportional
Carnosine and Homocarnosine Degradation Mechanisms by the Human Carnosinase Enzyme CN1: Insights from Multiscale Simulations
作者:Matic Pavlin、Giulia Rossetti、Marco De Vivo、Paolo Carloni
DOI:10.1021/acs.biochem.5b01263
日期:2016.5.17
occurs through a nucleophilic attack of a Zn2+-coordinated bridging moiety for both monomer and dimer. This mechanistic hypothesis for hCN1 catalysis differs from previous proposals, while it is in agreement with available experimental data. (ii) The experimentally measured higher affinity of homocarnosine for the enzyme relative to l-carnosine might be explained, at least in part, by more extensive
Human serum carnosinase: characterization, distinction from cellular carnosinase, and activation by cadmium
作者:James F. Lenney、Robert P. George、Anna M. Weiss、Christine M. Kucera、Paul W.H. Chan、Gary S. Rinzler
DOI:10.1016/0009-8981(82)90166-8
日期:1982.8
cellular carnosinase. For example, the serum isozyme hydrolyzed homocarnosine, whereas the cellular carnosinase did not. The apparent molecular weight of serumcarnosinase was 160 000, while that of the cellular isozyme was 90 000. Although it has been reported that serum contains two molecular forms of carnosinase, only one form was detected using several electrophoretic methods and two ion exchange chromatography