L-glutamine transmembrane transporter activity
Definition
Target type: molecularfunction
Enables the transfer of L-glutamine from one side of a membrane to the other. L-glutamine is 2-amino-4-carbamoylbutanoic acid. [GOC:ai, GOC:mtg_transport, ISBN:0815340729]
L-glutamine transmembrane transporter activity refers to the movement of L-glutamine across cell membranes. This process is essential for maintaining cellular homeostasis and providing vital amino acids for various metabolic pathways. L-glutamine is a non-essential amino acid that plays crucial roles in protein synthesis, nitrogen metabolism, and energy production. It also serves as a precursor for various other molecules, including glutamate, proline, and arginine.
The transmembrane transport of L-glutamine is facilitated by specific carrier proteins embedded in the cell membrane. These transporters bind to L-glutamine molecules on one side of the membrane, undergo a conformational change, and release the amino acid on the other side. The direction of transport can be either inward or outward depending on the concentration gradient and the specific transporter involved.
Several factors influence the activity of L-glutamine transporters, including:
1. **Concentration gradient:** L-glutamine transport generally occurs down its concentration gradient, moving from areas of high concentration to areas of low concentration.
2. **pH:** The pH of the cellular environment can affect the activity of L-glutamine transporters.
3. **Hormones and growth factors:** Certain hormones and growth factors can regulate the expression and activity of L-glutamine transporters.
4. **Metabolic state:** The metabolic needs of the cell can influence the demand for L-glutamine and, consequently, the activity of its transporters.
Dysregulation of L-glutamine transport is associated with various pathological conditions, including cancer, neurodegenerative diseases, and metabolic disorders. Therefore, understanding the molecular mechanisms underlying L-glutamine transmembrane transporter activity is crucial for developing novel therapeutic strategies for these diseases.'
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Proteins (2)
| Protein | Definition | Taxonomy |
|---|---|---|
| Neutral amino acid transporter B(0) | A neutral amino acid transporter B(0) that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q15758] | Homo sapiens (human) |
| Neutral amino acid transporter A | A neutral amino acid transporter A that is encoded in the genome of human. [PRO:DNx, UniProtKB:P43007] | Homo sapiens (human) |
Compounds (8)
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| hydroxyproline | hydroxyproline : A proline derivative that is proline substituted by at least one hydroxy group. Hydroxyproline: A hydroxylated form of the imino acid proline. A deficiency in ASCORBIC ACID can result in impaired hydroxyproline formation. | 4-hydroxyproline; L-alpha-amino acid zwitterion | human metabolite; mouse metabolite; plant metabolite |
| serine | serine : An alpha-amino acid that is alanine substituted at position 3 by a hydroxy group. Serine: A non-essential amino acid occurring in natural form as the L-isomer. It is synthesized from GLYCINE or THREONINE. It is involved in the biosynthesis of PURINES; PYRIMIDINES; and other amino acids. | L-alpha-amino acid; proteinogenic amino acid; serine; serine family amino acid; serine zwitterion | algal metabolite; Escherichia coli metabolite; human metabolite; mouse metabolite; Saccharomyces cerevisiae metabolite |
| glutamine | glutamine : An alpha-amino acid that consists of butyric acid bearing an amino substituent at position 2 and a carbamoyl substituent at position 4. Glutamine: A non-essential amino acid present abundantly throughout the body and is involved in many metabolic processes. It is synthesized from GLUTAMIC ACID and AMMONIA. It is the principal carrier of NITROGEN in the body and is an important energy source for many cells. L-glutamine : An optically active form of glutamine having L-configuration. | amino acid zwitterion; glutamine; glutamine family amino acid; L-alpha-amino acid; polar amino acid zwitterion; proteinogenic amino acid | EC 1.14.13.39 (nitric oxide synthase) inhibitor; Escherichia coli metabolite; human metabolite; metabolite; micronutrient; mouse metabolite; nutraceutical; Saccharomyces cerevisiae metabolite |
| asparagine | asparagine : An alpha-amino acid in which one of the hydrogens attached to the alpha-carbon of glycine is substituted by a 2-amino-2-oxoethyl group. Asparagine: A non-essential amino acid that is involved in the metabolic control of cell functions in nerve and brain tissue. It is biosynthesized from ASPARTIC ACID and AMMONIA by asparagine synthetase. (From Concise Encyclopedia Biochemistry and Molecular Biology, 3rd ed) | amino acid zwitterion; asparagine; aspartate family amino acid; L-alpha-amino acid; proteinogenic amino acid | Escherichia coli metabolite; human metabolite; micronutrient; mouse metabolite; nutraceutical; plant metabolite; Saccharomyces cerevisiae metabolite |
| 4-hydroxyphenylglycine, (s)-isomer | L-4-hydroxyphenylglycine : The L-enantiomer of 4-hydroxyphenylglycine. | 4-hydroxyphenylglycine | |
| D-serine | D-alpha-amino acid; serine; serine zwitterion | Escherichia coli metabolite; human metabolite; NMDA receptor agonist | |
| gamma-glutamine-4-nitroanilide | gamma-glutamine-4-nitroanilide: substrate for glutaminase B.; RN given refers to (L)-isomer | ||
| proline | proline : An alpha-amino acid that is pyrrolidine bearing a carboxy substituent at position 2. Proline: A non-essential amino acid that is synthesized from GLUTAMIC ACID. It is an essential component of COLLAGEN and is important for proper functioning of joints and tendons. | amino acid zwitterion; glutamine family amino acid; L-alpha-amino acid; proline; proteinogenic amino acid | algal metabolite; compatible osmolytes; Escherichia coli metabolite; micronutrient; mouse metabolite; nutraceutical; Saccharomyces cerevisiae metabolite |