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Related Concept Videos

Amino Acid Biosynthetic Pathways01:29

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Amino acid biosynthesis is essential for cell growth, protein synthesis, and metabolic regulation. Cells generate essential and non-essential amino acids from metabolic intermediates to sustain vital biological functions. These intermediates originate from key metabolic pathways: glycolysis, the tricarboxylic acid (TCA) cycle, and the pentose phosphate pathway. Important precursors include α-ketoglutarate, pyruvate, oxaloacetate, phosphoenolpyruvate, and erythrose-4-phosphate, which...
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Nucleic acid biosynthesis is a fundamental biochemical process that produces the purine and pyrimidine nucleotides essential for DNA and RNA synthesis. This pathway maintains a balanced nucleotide pool, preventing imbalances that could jeopardize genetic integrity and cellular function. Given the crucial role of nucleotides, their synthesis is tightly regulated to ensure proper cellular homeostasis.Purine BiosynthesisThe biosynthesis of purine nucleotides begins with ribose-5-phosphate, a...
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Phenylketonuria (PKU) is a protein metabolism disorder characterized by high blood levels of the amino acid phenylalanine. This results from a mutation in the gene responsible for phenylalanine hydroxylase, an enzyme that converts phenylalanine into tyrosine. When this enzyme is deficient, phenylalanine builds up in the blood, leading to symptoms such as vomiting, rashes, seizures, growth deficiency, and severe mental retardation. An early diagnosis and a diet restricting phenylalanine intake...
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Sulfur Assimilation01:20

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Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to...
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Modification of secretory and transmembrane proteins entering the rough ER begins in the ER lumen. These modifications aid in protein folding and stabilize the acquired tertiary structure. Protein modifications in the rough ER co-occur at different stages of protein folding.
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Related Experiment Video

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Functional Complementation Analysis FCA: A Laboratory Exercise Designed and Implemented to Supplement the Teaching of Biochemical Pathways
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Serine biosynthesis and transport defects.

Ayman W El-Hattab1

  • 1Division of Clinical Genetics and Metabolic Disorders, Pediatrics Department, Tawam Hospital, Al-Ain, United Arab Emirates.

Molecular Genetics and Metabolism
|May 11, 2016
PubMed
Summary
This summary is machine-generated.

L-serine deficiency, caused by biosynthesis or transport defects, leads to severe neurological issues. Early L-serine therapy shows promise in preventing or reducing symptoms in affected children.

Keywords:
ASCT1Neu–Laxova syndromePhosphoglycerate dehydrogenase (PGDH)Phosphoserine aminotransferase (PSAT)Phosphoserine phosphatase (PSP)SLC1A4 geneSerine transporter

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Area of Science:

  • Biochemistry
  • Genetics
  • Neurology

Background:

  • L-serine is a crucial amino acid for protein synthesis and a precursor for vital compounds.
  • Defects in L-serine biosynthesis (via PGDH, PSAT, PSP) or transport (ASCT1) cause systemic serine deficiency.
  • These defects manifest in a spectrum of disorders, from lethal congenital anomalies to intellectual disability.

Purpose of the Study:

  • To review serine metabolism and transport.
  • To detail the clinical, biochemical, and molecular aspects of serine biosynthesis and transport defects.
  • To explore the therapeutic potential of L-serine supplementation.

Main Methods:

  • Literature review of serine metabolism, biosynthesis, and transport.
  • Analysis of clinical, biochemical, and molecular data from patients with serine deficiency disorders.
  • Evaluation of existing research on L-serine therapy.

Main Results:

  • Serine biosynthesis defects (PGDH, PSAT, PSP) and transport defects (ASCT1) result in diverse neurological and developmental problems.
  • The phenotypic spectrum ranges from severe congenital anomalies to milder intellectual disabilities.
  • Early L-serine therapy may mitigate or prevent neurological damage.

Conclusions:

  • Understanding serine metabolism and transport is key to diagnosing and managing these disorders.
  • Targeted L-serine therapy, initiated before neurological damage, offers a potential treatment strategy.
  • Further research is needed to optimize serine therapy for different types of serine deficiency.