PMID- 28955961 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200930 IS - 2405-5808 (Print) IS - 2405-5808 (Electronic) IS - 2405-5808 (Linking) VI - 8 DP - 2016 Dec TI - Kynurenine aminotransferase 3/glutamine transaminase L/cysteine conjugate beta-lyase 2 is a major glutamine transaminase in the mouse kidney. PG - 234-241 LID - 10.1016/j.bbrep.2016.09.008 [doi] AB - BACKGROUND: Kynurenine aminotransferase 3 (KAT3) catalyzes the transamination of Kynurenine to kynurenic acid, and is identical to cysteine conjugate beta-lyase 2 (CCBL2) and glutamine transaminase L (GTL). GTL was previously purified from the rat liver and considered as a liver type glutamine transaminase. However, because of the substrate overlap and high sequence similarity of KAT3 and KAT1, it was difficult to assay the specific activity of each KAT and to study the enzyme localization in animals. METHODS: KAT3 transcript and protein levels as well as enzyme activity in the liver and kidney were analyzed by regular reverse transcription-polymerase chain reaction (RT-PCR), real time RT-PCR, biochemical activity assays combined with a specific inhibition assay, and western blotting using a purified and a highly specific antibody, respectively. RESULTS: This study concerns the comparative biochemical characterization and localization of KAT 3 in the mouse. The results showed that KAT3 was present in both liver and kidney of the mouse, but was much more abundant in the kidney than in the liver. The mouse KAT3 is more efficient in transamination of glutamine with indo-3-pyruvate or oxaloacetate as amino group acceptor than the mouse KAT1. CONCLUSIONS: Mouse KAT3 is a major glutamine transaminase in the kidney although it was named a liver type transaminase. GENERAL SIGNIFICANCE: Our data highlights KAT3 as a key enzyme for studying the nephrotoxic mechanism of some xenobiotics and the formation of chemopreventive compounds in the mouse kidney. This suggests tissue localizations of KAT3/GTL/CCBL2 in other animals may be carefully checked. FAU - Yang, Cihan AU - Yang C AD - Key Laboratory of Tropical Biological Resources of Ministry of Education, Hainan University, Haikou, Hainan 570228, China. AD - Laboratory of Tropical Veterinary Medicine and Vector Biology, College of Agriculture, Hainan University, Haikou, Hainan 570228, China. FAU - Zhang, Lei AU - Zhang L AD - Key Laboratory of Tropical Biological Resources of Ministry of Education, Hainan University, Haikou, Hainan 570228, China. AD - Laboratory of Tropical Veterinary Medicine and Vector Biology, College of Agriculture, Hainan University, Haikou, Hainan 570228, China. FAU - Han, Qian AU - Han Q AD - Key Laboratory of Tropical Biological Resources of Ministry of Education, Hainan University, Haikou, Hainan 570228, China. AD - Laboratory of Tropical Veterinary Medicine and Vector Biology, College of Agriculture, Hainan University, Haikou, Hainan 570228, China. AD - Department of Biochemistry, Virginia Tech, Blacksburg, VA 24061, USA. FAU - Liao, Chenghong AU - Liao C AD - Key Laboratory of Tropical Biological Resources of Ministry of Education, Hainan University, Haikou, Hainan 570228, China. AD - Laboratory of Tropical Veterinary Medicine and Vector Biology, College of Agriculture, Hainan University, Haikou, Hainan 570228, China. FAU - Lan, Jianqiang AU - Lan J AD - Key Laboratory of Tropical Biological Resources of Ministry of Education, Hainan University, Haikou, Hainan 570228, China. AD - Laboratory of Tropical Veterinary Medicine and Vector Biology, College of Agriculture, Hainan University, Haikou, Hainan 570228, China. FAU - Ding, Haizhen AU - Ding H AD - Department of Biochemistry, Virginia Tech, Blacksburg, VA 24061, USA. FAU - Zhou, Hailong AU - Zhou H AD - Laboratory of Tropical Veterinary Medicine and Vector Biology, College of Agriculture, Hainan University, Haikou, Hainan 570228, China. FAU - Diao, Xiaoping AU - Diao X AD - Laboratory of Tropical Veterinary Medicine and Vector Biology, College of Agriculture, Hainan University, Haikou, Hainan 570228, China. FAU - Li, Jianyong AU - Li J AD - Department of Biochemistry, Virginia Tech, Blacksburg, VA 24061, USA. LA - eng PT - Journal Article DEP - 20160921 PL - Netherlands TA - Biochem Biophys Rep JT - Biochemistry and biophysics reports JID - 101660999 PMC - PMC5613967 OTO - NOTNLM OT - Aminotransferase OT - CCBL, cysteine conjugate beta-lyase OT - Cysteine conjugate beta-lyase 2 OT - GTK, glutamine transaminase K OT - GTL, glutamine transaminase L OT - Glutamine transaminase OT - KAT, kynurenine aminotransferase OT - KYNA, kynurenic acid OT - Kynurenic acid OT - Kynurenine OT - Kynurenine aminotransferase OT - PLP, pyridoxal-5'-phosphate. EDAT- 2017/09/29 06:00 MHDA- 2017/09/29 06:01 PMCR- 2016/09/21 CRDT- 2017/09/29 06:00 PHST- 2016/08/22 00:00 [received] PHST- 2016/09/19 00:00 [revised] PHST- 2016/09/19 00:00 [accepted] PHST- 2017/09/29 06:00 [entrez] PHST- 2017/09/29 06:00 [pubmed] PHST- 2017/09/29 06:01 [medline] PHST- 2016/09/21 00:00 [pmc-release] AID - S2405-5808(16)30189-3 [pii] AID - 10.1016/j.bbrep.2016.09.008 [doi] PST - epublish SO - Biochem Biophys Rep. 2016 Sep 21;8:234-241. doi: 10.1016/j.bbrep.2016.09.008. eCollection 2016 Dec.