Just Arrange. The enzyme serine hydroxymethyltransferase (SHMT) requires pyridoxal phosphate (PLP) as a cofactor. Arrange the steps of the likely mechanism for SHMT‑catalyzed serine degradation (producing glycine and N5,N10‑methylenetetrahydrofolate)
Just Arrange. The enzyme serine hydroxymethyltransferase (SHMT) requires pyridoxal phosphate (PLP) as a cofactor. Arrange the steps of the likely mechanism for SHMT‑catalyzed serine degradation (producing glycine and N5,N10‑methylenetetrahydrofolate)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
Related questions
Question
Just Arrange.
The enzyme serine hydroxymethyltransferase (SHMT) requires pyridoxal phosphate (PLP) as a cofactor.
Arrange the steps of the likely mechanism for SHMT‑catalyzed serine degradation (producing glycine and N5,N10‑methylenetetrahydrofolate)
Transcribed Image Text:The enzyme serine hydroxymethyltransferase (SHMT) requires pyridoxal phosphate (PLP) as a cofactor.
Arrange the steps of the likely mechanism for SHMT-catalyzed serine degradation (producing glycine and
N°,N!0-methylenetetrahydrofolate).
First step
Last step
Answer Bank
Formaldehyde is released, forming a PLP-stabilized carbanion. The formaldehyde reacts with tetrahydrofolate to
form N°,N10-methylenetetrahydrofolate.
The enzyme acts as a base and abstracts the hydrogen of the hydroxyl group on serine.
The N-terminal amine of serine performs a nucleophilic attack on enzyme-bound PLP, forming a covalent imido
linkage between serine and PLP.
The carbanion is protonated by the enzyme, forming glycine covalently linked to PLP.
An active site lysine reacts with the PLP to restore the active enzyme and release glycine.
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Recommended textbooks for you
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:
9780134580999
Author:
Elaine N. Marieb, Katja N. Hoehn
Publisher:
PEARSON
Biology 2e
Biology
ISBN:
9781947172517
Author:
Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:
OpenStax
Anatomy & Physiology
Biology
ISBN:
9781259398629
Author:
McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:
Mcgraw Hill Education,
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:
9780134580999
Author:
Elaine N. Marieb, Katja N. Hoehn
Publisher:
PEARSON
Biology 2e
Biology
ISBN:
9781947172517
Author:
Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:
OpenStax
Anatomy & Physiology
Biology
ISBN:
9781259398629
Author:
McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:
Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:
9780815344322
Author:
Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:
W. W. Norton & Company
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:
9781260159363
Author:
Martin, Terry R., Prentice-craver, Cynthia
Publisher:
McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)
Biology
ISBN:
9781260231700
Author:
Sylvia S. Mader, Michael Windelspecht
Publisher:
McGraw Hill Education