Skip to content

Fatty acid degradation reactions without GPR rules #979

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
ina999111 opened this issue Feb 17, 2025 · 0 comments
Open

Fatty acid degradation reactions without GPR rules #979

ina999111 opened this issue Feb 17, 2025 · 0 comments

Comments

@ina999111
Copy link

The following reactions don’t have GPR rules: MAR03396, MAR03397, MAR03053, MAR03054 and MAR03056. Also, they are lumped reaction describing 7 to 11 beta-oxidation cycles.

Moreover, the reactions MAR03053 and MAR03054 describe the complete oxidation of acyl-CoA’s that contain double bound, a process that requires the action of 2,4-dienoyl-CoA reductase (coded by DECR1/2). Since this enzyme uses NADP(H) as cofactors, the lumped reactions should also contain NADP(H).

(10Z)-heptadecenoyl-CoA + 7.0 CoA + 6.0 FAD + 7.0 H2O + 7.0 NAD+ --> 7.0 acetyl-CoA + 6.0 FADH2 + 7.0 H+ + 7.0 NADH + propanoyl-CoA MAR03396
9-heptadecenoyl-CoA + 7.0 CoA + 6.0 FAD + 7.0 H2O + 7.0 NAD+ --> 7.0 acetyl-CoA + 6.0 FADH2 + 7.0 H+ + 7.0 NADH + propanoyl-CoA MAR03397
12,15,18,21-tetracosatetraenoyl-CoA + 11.0 CoA + 7.0 FAD + 11.0 H2O + 11.0 NAD+ --> 12.0 acetyl-CoA + 7.0 FADH2 + 11.0 H+ + 11.0 NADH MAR03053
(9Z,12Z,15Z,18Z,21Z)-tetracosapentaenoyl-CoA + 11.0 CoA + 6.0 FAD + 11.0 H2O + 11.0 NAD+ --> 12.0 acetyl-CoA + 6.0 FADH2 + 11.0 H+ + 11.0 NADH MAR03054
10.0 CoA + 10.0 FAD + 10.0 H2O + 10.0 NAD+ + tricosanoyl-CoA --> 10.0 acetyl-CoA + 10.0 FADH2 + 10.0 H+ + 10.0 NADH + propanoyl-CoA MAR03056

My understanding from other issues is that reactions describing beta-oxidation should span at most 1 beta-oxidation cycle. Therefore, I suggest creating new reactions describing these processes in details instead of correcting the lumped reactions by adding NADP(H) and GPR rules.

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Labels
None yet
Projects
None yet
Development

No branches or pull requests

1 participant