5′-METHYLTHIOADENOSINE (MTA) PHOSPHORYLASE FROM LEISHMANIA DONOVANI: 103
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چکیده
منابع مشابه
Substrate specificity of 5'-methylthioadenosine phosphorylase from human prostate.
5'-Methylthioadenosine phosphorylase was purified approx. 340-fold from human prostate by using affinity chromatography by Hg-coupled Sepharose. The enzyme, responsible for the breakdown of 5'-methylthioadenosine into adenine and methylthioribose 1-phosphate, was partially characterized. The apparent Km for 5'-methylthioadenosine is 25 microM. It is activated by thiols and shows an absolute req...
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Methylthioadenosine phosphorylase, (MTAP) is a key enzyme in the adenine and methionine salvage pathways. MTAP is encoded on human chromosome 9p21 in close proximity to the p16INK4a and p14ARF tumor suppressor genes and is frequently co-deleted with p16INK4a in many cancers. Deletion of MTAP has been reported to create a reliance of MTAP tumors on de novo purine synthesis to maintain adequate p...
متن کاملPurification and characterization of 5'-deoxy-5'-methylthioadenosine phosphorylase from human placenta.
5'-Methylthioadenosine phosphorylase has been purified to homogeneity (30,000-fold) from human full-term placenta by a procedure involving covalent chromatography on organomercurial-agarose as the major step. The specific activity of the homogeneous enzyme is 10.2 mumol of 5'-methylthioadenosine cleaved per min per mg of protein, and the overall yield is about 20%. The enzyme has a molecular we...
متن کاملAspartate Transcarbamylase from Leishmania donovani
Leishmania donovani is a protozoal pathogen that belongs to the kinetoplastida order. Unlike in other eucaryotic systems, the first three enzymes of the de novo pyrimidine biosynthetic pathway are not components of a multifunctional protein system. The three enzyme activities in the crude extract were separated on a Sephacryl S-200 column. Aspartate carbamoyltransferase (EC 2.1.3.2) has been pu...
متن کاملTherapeutic targeting of methylthioadenosine phosphorylase
Methylthioadenosine Phosphorylase is a well-known tumor suppressor and a regulator for purine and pyrimidine synthesis and metabolism. Several previous studies show MTAP could be a prognostic marker independent or coordinate with p16 in multiple cancer types. Furthermore, inhibitors of MTAP have been developed and tested in in vitro and in vivo experiment to support the selective tumor cell-kil...
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ژورنال
عنوان ژورنال: Pediatric Research
سال: 1985
ISSN: 0031-3998,1530-0447
DOI: 10.1203/00006450-198507000-00123