IUBMB Enzyme Nomenclature


Accepted name: L-alanine-L-anticapsin ligase

Reaction: ATP + L-alanine + L-anticapsin = ADP + phosphate + bacilysin

For diagram of reaction click here.

Glossary: L-anticapsin = 3-[(1R,2S,6R)-5-oxo-7-oxabicyclo[4.1.0]hept-2-yl]-L-alanine
bacilysin = L-alanyl-3-[(1R,2S,6R)-5-oxo-7-oxabicyclo[4.1.0]hept-2-yl]-L-alanine

Other name(s): BacD; alanine-anticapsin ligase; L-Ala-L-anticapsin ligase; ywfE (gene name)

Systematic name: L-alanine:L-anticapsin ligase (ADP-forming)

Comments: The enzyme, characterized from the bacterium Bacillus subtilis, is involved in the biosynthesis of the nonribosomally synthesized dipeptide antibiotic bacilysin, composed of L-alanine and L-anticapsin. The enzyme requires Mg2+ or Mn2+ for activity, and has a broad substrate specificity in vitro [1].

Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, PDB, CAS registry number:


1. Tabata, K., Ikeda, H. and Hashimoto, S. ywfE in Bacillus subtilis codes for a novel enzyme, L-amino acid ligase. J. Bacteriol. 187 (2005) 5195-5202. [PMID: 16030213]

2. Tsuda, T., Suzuki, T. and Kojima, S. Crystallization and preliminary X-ray diffraction analysis of Bacillus subtilis YwfE, an L-amino-acid ligase. Acta Crystallogr. Sect. F Struct. Biol. Cryst. Commun. 68 (2012) 203-206. [PMID: 22298000]

3. Shomura, Y., Hinokuchi, E., Ikeda, H., Senoo, A., Takahashi, Y., Saito, J., Komori, H., Shibata, N., Yonetani, Y. and Higuchi, Y. Structural and enzymatic characterization of BacD, an L-amino acid dipeptide ligase from Bacillus subtilis. Protein Sci. 21 (2012) 707-716. [PMID: 22407814]

4. Parker, J.B. and Walsh, C.T. Action and timing of BacC and BacD in the late stages of biosynthesis of the dipeptide antibiotic bacilysin. Biochemistry 52 (2013) 889-901. [PMID: 23317005]

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