Login

Join for Free!
118246 members


Gene, Enzyme

Genetics as it applies to evolution, molecular biology, and medical aspects.

Moderator: BioTeam

Gene, Enzyme

Postby ngfok » Thu Mar 16, 2006 12:33 am

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.
ngfok
Garter
Garter
 
Posts: 8
Joined: Thu Mar 16, 2006 12:30 am

Postby Khaiy » Thu Mar 16, 2006 3:09 am

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.
User avatar
Khaiy
Coral
Coral
 
Posts: 158
Joined: Tue Feb 28, 2006 2:37 am

Postby asutoshsahu » Thu Mar 16, 2006 6:39 am

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
User avatar
asutoshsahu
Death Adder
Death Adder
 
Posts: 98
Joined: Tue Jun 28, 2005 7:41 am
Location: India


Postby MrMistery » Thu Mar 16, 2006 8:07 pm

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)
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
User avatar
MrMistery
Inland Taipan
Inland Taipan
 
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)

Postby Khaiy » Thu Mar 16, 2006 10:27 pm

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
User avatar
Khaiy
Coral
Coral
 
Posts: 158
Joined: Tue Feb 28, 2006 2:37 am


Return to Genetics

Who is online

Users browsing this forum: No registered users and 3 guests