Acylation of glycerolipids in mycobacteria.

Acylation of glycerolipids in mycobacteria.
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DOI:
10.1038/s41467-023-42478-x
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发表时间:
2023-10-23
影响因子:
16.6
通讯作者:
Jackson M
Jackson M
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Angala SK;Carreras-Gonzalez A;Huc-Claustre E;Anso I;Kaur D;Jones V;Palčeková Z;Belardinelli JM;de Sousa-d'Auria C;Shi L;Slama N;Houssin C;Quémard A;McNeil M;Guerin ME;Jackson M

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我们报道了分枝杆菌中存在两种磷脂酸生物合成途径,一种是经典途径,其中甘油-3-磷酸(G3P)的sn-1位置的酰化先于sn-2,另一种是其中酰化以相反的顺序进行。两种独特的酰基转移酶 PlsM 和 PlsB2 参与这两条途径,并掌握着代表分枝杆菌甘油脂的酰基链异常位置分布的关键,其中不饱和取代基主要酯化位置 sn-1,棕榈酰基主要占据位置 sn-2。 PlsM 选择性地将棕榈酰链转移到 G3P 和 sn-1-溶血磷脂酸 (LPA) 的 sn-2 位,而 PlsB2 优先将硬脂酰基或油酰基链转移到 G3P 的 sn-1 位,将油酰基链转移到 sn-2-LPA。 PlsM 是植物界之外第一个 sn-2 G3P 酰基转移酶的例子,PlsB2 是 2-酰基-G3P 酰基转移酶的第一个例子。这两种酶都具有独特的催化酰基转移至 G3P 和 LPA 的能力。本文报道了两种能够将酰基链转移至甘油-3-磷酸和溶血磷脂酸的位置 1 或位置 2 的分枝杆菌甘油脂酰基转移酶。
We report on the existence of two phosphatidic acid biosynthetic pathways in mycobacteria, a classical one wherein the acylation of the sn-1 position of glycerol-3-phosphate (G3P) precedes that of sn-2 and another wherein acylations proceed in the reverse order. Two unique acyltransferases, PlsM and PlsB2, participate in both pathways and hold the key to the unusual positional distribution of acyl chains typifying mycobacterial glycerolipids wherein unsaturated substituents principally esterify position sn-1 and palmitoyl principally occupies position sn-2. While PlsM selectively transfers a palmitoyl chain to the sn-2 position of G3P and sn-1-lysophosphatidic acid (LPA), PlsB2 preferentially transfers a stearoyl or oleoyl chain to the sn-1 position of G3P and an oleyl chain to sn-2-LPA. PlsM is the first example of an sn-2 G3P acyltransferase outside the plant kingdom and PlsB2 the first example of a 2-acyl-G3P acyltransferase. Both enzymes are unique in their ability to catalyze acyl transfer to both G3P and LPA. This paper reports on two mycobacterial glycerolipid acyltransferases capable of transferring acyl chains to position 1 or position 2 of both glycerol-3-phosphate and lysophosphatidic acid.
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