In enzymology, a -alanineâÂÂpoly(phosphoribitol) ligase () is an enzyme that catalyzes the chemical reaction
The 3 substrates of this enzyme are ATP, -alanine, and poly(ribitol phosphate), whereas its 3 products are AMP, diphosphate, and o--alanyl-poly(ribitol phosphate).
This enzyme belongs to the family of ligases, to be specific those forming carbonâÂÂoxygen bonds in aminoacyl-tRNA and related compounds. The systematic name of this enzyme class is -alanine:poly(phosphoribitol) ligase (AMP-forming). Other names in common use include -alanyl-poly(phosphoribitol) synthetase, -alanine: membrane acceptor ligase, -alanine--alanyl carrier protein ligase, -alanine-membrane acceptor ligase, and -alanine-activating enzyme. This enzyme participates in -alanine metabolism.