The regulation of aspartate derived amino acids in Arabidopsis thaliana is depicted as an integrated network...

The regulation of aspartate derived amino acids in Arabidopsis thaliana is depicted as an integrated network involving pathway end products that act as allosteric effectors on enzymes in intermediate steps.
1. Explain the downstream consequence of a reduction in the amount of S-Adenosyl methionine (SAM) on the overall flux of carbon through the various branches of this metabolic pathway.
2. The first step in converting aspartate into other amino acids is the phosphorylation of aspartate. In A. thaliana, there are five distinct aspartate kinase enzymes, two of which (AK I and AK II) are bi-functional enzymes that also possess homoserine dehydrogenase activity (HSDH I and
  HSDH II, respectively). What is the net effect of combining AK and HSDH activities into one enzyme? How does regulation of AK I/HSDH I and AK II/HSDH II impact the flow of carbon skeletons toward the possible end products in this pathway?

Solutions

Expert Solution

gladiator answered 1 week ago

Next > < Previous

Related Solutions

Steroid hormones are derived from _ and synthesized by _. Amino acids, rough endoplasmic reticulum Amino...

Steroid hormones are derived from ___ and synthesized by ___. Amino acids, rough endoplasmic reticulum Amino acids, smooth endoplasmic reticulum Cholesterol, ribosomes Cholesterol, smooth endoplasmic reticulum Proteines, mitochondria The hormones that regulate blood calcium levels are ____ Insulin and glucagon Thyroxine and triiodothyronine Antiduretic hormone and glucocorticoids Epinephrine and norepinephrine Parathyroid hormone and calcitonin Which of the following hormones is responsible for the “fight or flight” response? Thyroxine Parathyroid hormone Epinephrine Glucagon mineralocorticoids Glucagon and insulin are secreted by the____...

How do the amino acids aspartate and alanine provide a source of carbon for gluconeogenesis? Write...

How do the amino acids aspartate and alanine provide a source of carbon for gluconeogenesis? Write out the structures for the interconversions of these amino acids and their corresponding deaminated (amino group removed) α-keto acids.

Suppose you used a paper chromatography method to separate all the amino acids, but aspartate (aspartic...

Suppose you used a paper chromatography method to separate all the amino acids, but aspartate (aspartic acid) and glutamine were not resolved. Which of the following would be your best next step to separate these 2 amino acids? There may be more than one possibility. Pick one choice and justify it. Choices: (paper electrophoresis at pH 2) (paper electrophoresis at pH 12) (paper chromatography) (trypsin treatment) (paper electrophoresis at either pH).

1. If muscle-derived amino acids are used for gluconeogenesis, why does the rate of glucose output...

1. If muscle-derived amino acids are used for gluconeogenesis, why does the rate of glucose output by the liver slow during prolonged starvation?

Subjects

Question