Perhaps you have to look under polyhydroxybutyrate synthase?  Alkanoate is a generic chemical term.

Hi Swati,  if you have generated a homology model of the mentioned protein then it is possible to know the active site of the protein. You can use the protein sequences of template( whose experimental 3D structure is known)  and query(your protein) to align them using multiple sequence alignment tools( Clustal omega, Multalign etc). Also you can compare the structure of template and homology model. Submitting the sequence into the BlastP search will tell about the protein family. We will not find the particular name of active site of ur protein in the literature, because active site is a general term which is used for all enzymes. There are various insilico tools , which predict cavities( also active site) like, CastP, Q site finder, LigSite , MetaPocket etc. But the best way will be, to first comapre ur protein sequence with the template sequence. 

Hi Swati,

I am not sure what exactly you are asking but perhaps this article helps you find the answer: PubMed: 12409309. This PubMed ID also refers to the crystal structure in Protein Data Bank under 1IQ6 code.

Andrei

Hi Swati,

You wont find the particular name of active site of ur protein. But you can use many active site prediction servers available. Here are some links

http://www.scfbio-iitd.res.in/dock/ActiveSite.jsp

http://dogsite.zbh.uni-hamburg.de/

http://bioinformatictools.wordpress.com/tag/pocket-finder/

In the third link you will find many tools for prediction of active site

Look into Joann Stubbe's work (Annu. Rev. Biochem. 2005. 74:433–80).  The enzyme has an active site cysteine.