Gene, Enzyme

[ngfok]

Is enzyme a gene? Cause i read this article. And i don't know what the gene is. "A gene taken from daffodil is responsible for producing the enzyme phytoene synthase. The gene is controlled by a rice promoter and is only expressed in the endosperm. phytoene synthase catalyzes the reaction that convertss two GGDP molecules to phytoene, the first step in provitamin - A synthesis." IS the gene Phytoene Synthase? is it both enzyme and a gene.

[Khaiy]

No, not quite. The way that genes work is that each particular gene codes for a particular protein. Enzymes are proteins that are shaped a certain way, so that they can operate on particular substrates. The gene that the article described is the one that codes for the enzyme phytoene synthase.

[asutoshsahu]

Hey the "one gene one enzyme concept" proposed by Beedle & Tatum has been discarded.

The new concept is "one cistron one enzyme"

This means one cistron (the functional part of gene) codes for one enzyme.

I think this will help you better

[MrMistery]

Doesn't one cistron code for a particular polipeptide chain? If so, more cistrons can code for one enzyme, cause some enzymes and other proteins have more than one polipeptide chain(cuarternary structure)

[Khaiy]

I wasn't being literal, it's just an easier illustration with the one to one idea. Although you're right, I really should have been clearer, because what I wrote was wrong :p