NAD+激酶
运输机
线粒体
柠檬酸循环
细胞生物学
生物
生物化学
机制(生物学)
电子传输链
化学
新陈代谢
基因
酶
认识论
哲学
作者
Shivansh Goyal,Xiaolu A. Cambronne
出处
期刊:Biochemical Society Transactions
[Portland Press]
日期:2023-12-18
卷期号:51 (6): 1989-2004
摘要
SLC25A51 is the primary mitochondrial NAD+ transporter in humans and controls many local reactions by mediating the influx of oxidized NAD+. Intriguingly, SLC25A51 lacks several key features compared with other members in the mitochondrial carrier family, thus its molecular mechanism has been unclear. A deeper understanding would shed light on the control of cellular respiration, the citric acid cycle, and free NAD+ concentrations in mammalian mitochondria. This review discusses recent insights into the transport mechanism of SLC25A51, and in the process highlights a multitiered regulation that governs NAD+ transport. The aspects regulating SLC25A51 import activity can be categorized as contributions from (1) structural characteristics of the transporter itself, (2) its microenvironment, and (3) distinctive properties of the transported ligand. These unique mechanisms further evoke compelling new ideas for modulating the activity of this transporter, as well as new mechanistic models for the mitochondrial carrier family.
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