Page last updated: 2024-10-24
vacuolar membrane
Definition
Target type: cellularcomponent
The lipid bilayer surrounding the vacuole and separating its contents from the cytoplasm of the cell. [GOC:ai]
The vacuolar membrane, also known as the tonoplast, is a selectively permeable membrane that encloses the vacuole, a large, fluid-filled organelle found in plant cells. It plays a crucial role in maintaining cell turgor, regulating ion homeostasis, storing nutrients and waste products, and sequestering toxic substances. The vacuolar membrane is composed of a phospholipid bilayer similar to other cellular membranes, but it contains a unique set of proteins that are responsible for its specific functions. These proteins include transporters, channels, and enzymes that regulate the movement of ions, water, and other molecules across the membrane. The vacuolar membrane is also involved in the formation of vesicles, which are small membrane-bound sacs that transport substances within the cell. The vacuole itself is a dynamic organelle that can change size and shape in response to environmental cues, and the vacuolar membrane is essential for maintaining the structural integrity and functional properties of this important cellular compartment.'
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Proteins (3)
| Protein | Definition | Taxonomy |
|---|---|---|
| Proton-coupled amino acid transporter 1 | A proton-coupled amino acid transporter 1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q7Z2H8] | Homo sapiens (human) |
| ATP-binding cassette sub-family C member 11 | An ATP-binding cassette sub-family C member 11 that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q96J66] | Homo sapiens (human) |
| 14-3-3 protein beta/alpha | A 14-3-3 protein beta/alpha that is encoded in the genome of human. [PRO:WCB, UniProtKB:P31946] | Homo sapiens (human) |
Compounds (43)
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| gamma-aminobutyric acid | gamma-aminobutyric acid : A gamma-amino acid that is butanoic acid with the amino substituent located at C-4. gamma-Aminobutyric Acid: The most common inhibitory neurotransmitter in the central nervous system. | amino acid zwitterion; gamma-amino acid; monocarboxylic acid | human metabolite; neurotransmitter; Saccharomyces cerevisiae metabolite; signalling molecule |
| beta-alanine | amino acid zwitterion; beta-amino acid | agonist; fundamental metabolite; human metabolite; inhibitor; neurotransmitter | |
| betaine | glycine betaine : The amino acid betaine derived from glycine. | amino-acid betaine; glycine derivative | fundamental metabolite |
| aminocaproic acid | 6-aminohexanoic acid : An epsilon-amino acid comprising hexanoic acid carrying an amino substituent at position C-6. Used to control postoperative bleeding, and to treat overdose effects of the thrombolytic agents streptokinase and tissue plasminogen activator. Aminocaproic Acid: An antifibrinolytic agent that acts by inhibiting plasminogen activators which have fibrinolytic properties. | amino acid zwitterion; epsilon-amino acid; omega-amino fatty acid | antifibrinolytic drug; hematologic agent; metabolite |
| creatine | glycine derivative; guanidines; zwitterion | geroprotector; human metabolite; mouse metabolite; neuroprotective agent; nutraceutical | |
| glycine | alpha-amino acid; amino acid zwitterion; proteinogenic amino acid; serine family amino acid | EC 2.1.2.1 (glycine hydroxymethyltransferase) inhibitor; fundamental metabolite; hepatoprotective agent; micronutrient; neurotransmitter; NMDA receptor agonist; nutraceutical | |
| glycocyamine | glycocyamine: RN given refers to parent cpd; structure guanidinoacetate : A monocarboxylic acid anion that is the conjugate base of guanidinoacetic acid, obtained by deprotonation of the carboxy group. guanidinoacetic acid : The N-amidino derivative of glycine. | guanidinoacetic acids; zwitterion | bacterial metabolite; human metabolite; mouse metabolite; nutraceutical; rat metabolite |
| picolinic acid | picolinic acid : A pyridinemonocarboxylic acid in which the carboxy group is located at position 2. It is an intermediate in the metabolism of tryptophan. picolinic acid: iron-chelating agent that inhibits DNA synthesis; may interfere with iron-dependent production of stable free organic radical which is essential for ribonucleotide reductase formation of deoxyribonucleotides; RN given refers to parent cpd; structure in Merck Index, 9th ed, #7206 | pyridinemonocarboxylic acid | human metabolite; MALDI matrix material |
| sarcosine | cocobetaine: N-alkyl-betaine; cause of shampoo dermatitis | N-alkylglycine; N-alkylglycine zwitterion; N-methyl-amino acid; N-methylglycines | Escherichia coli metabolite; glycine receptor agonist; glycine transporter 1 inhibitor; human metabolite; mouse metabolite |
| taurine | amino sulfonic acid; zwitterion | antioxidant; Escherichia coli metabolite; glycine receptor agonist; human metabolite; mouse metabolite; nutrient; radical scavenger; Saccharomyces cerevisiae metabolite | |
| tramiprosate | 3-aminopropanesulfonic acid : An amino sulfonic acid that is the 3-amino derivative of propanesulfonic acid. tramiprosate: GABA receptor agonist and a glycosaminoglycan mimetic; has nootropic acitivity; structure; a sulfonate analog of GABA | amino sulfonic acid; zwitterion | algal metabolite; anti-inflammatory agent; anticonvulsant; GABA agonist; nootropic agent |
| isoguvacine | isoguvacine: A GABA agonist; RN given refers to parent cpd; structure | tetrahydropyridine | |
| 4-piperidinecarboxylic acid | 4-piperidinecarboxylic acid: structure in first source | ||
| 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 |
| cysteine | cysteine; cysteine zwitterion; L-alpha-amino acid; proteinogenic amino acid; serine family amino acid | EC 4.3.1.3 (histidine ammonia-lyase) inhibitor; flour treatment agent; human metabolite | |
| alanine | alanine : An alpha-amino acid that consists of propionic acid bearing an amino substituent at position 2. Alanine: A non-essential amino acid that occurs in high levels in its free state in plasma. It is produced from pyruvate by transamination. It is involved in sugar and acid metabolism, increases IMMUNITY, and provides energy for muscle tissue, BRAIN, and the CENTRAL NERVOUS SYSTEM. | alanine; alanine zwitterion; L-alpha-amino acid; proteinogenic amino acid; pyruvate family amino acid | EC 4.3.1.15 (diaminopropionate ammonia-lyase) inhibitor; fundamental 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 |
| leucine | leucine : A branched-chain amino acid that consists of glycine in which one of the hydrogens attached to the alpha-carbon is substituted by an isobutyl group. Leucine: An essential branched-chain amino acid important for hemoglobin formation. | amino acid zwitterion; L-alpha-amino acid; leucine; proteinogenic amino acid; pyruvate family amino acid | algal metabolite; Escherichia coli metabolite; human metabolite; mouse metabolite; plant metabolite; Saccharomyces cerevisiae metabolite |
| 2-aminoisobutyric acid | 2-aminoisobutyric acid : A rare, non-protein amino acid and end-product of pyrimidine metabolism, excreted in urine and found in some antibiotics of fungal origin. With the exception of a few bacteria, it is non-metabolisable, and therefore used in bioassays. 2-aminoisobutyric acid: RN given refers to unlabeled cpd | 2,2-dialkylglycine; 2,2-dialkylglycine zwitterion | |
| cycloserine | Cycloserine: Antibiotic substance produced by Streptomyces garyphalus. D-cycloserine : A 4-amino-1,2-oxazolidin-3-one that has R configuration. It is an antibiotic produced by Streptomyces garyphalus or S. orchidaceus and is used as part of a multi-drug regimen for the treatment of tuberculosis when resistance to, or toxicity from, primary drugs has developed. An analogue of D-alanine, it interferes with bacterial cell wall synthesis in the cytoplasm by competitive inhibition of L-alanine racemase (which forms D-alanine from L-alanine) and D-alanine--D-alanine ligase (which incorporates D-alanine into the pentapeptide required for peptidoglycan formation and bacterial cell wall synthesis). | 4-amino-1,2-oxazolidin-3-one; organonitrogen heterocyclic antibiotic; organooxygen heterocyclic antibiotic; zwitterion | antiinfective agent; antimetabolite; antitubercular agent; metabolite; NMDA receptor agonist |
| isoleucine | isoleucine : A 2-amino-3-methylpentanoic acid having either (2R,3R)- or (2S,3S)-configuration. Isoleucine: An essential branched-chain aliphatic amino acid found in many proteins. It is an isomer of LEUCINE. It is important in hemoglobin synthesis and regulation of blood sugar and energy levels. L-isoleucine : The L-enantiomer of isoleucine. | aspartate family amino acid; isoleucine; L-alpha-amino acid; L-alpha-amino acid zwitterion; proteinogenic amino acid | algal metabolite; Escherichia coli metabolite; human metabolite; mouse metabolite; plant metabolite; Saccharomyces cerevisiae metabolite |
| 3-aminobenzoic acid | 3-aminobenzoic acid : An aminobenzoic acid carrying an amino group at position 3. 3-aminobenzoic acid: RN given refers to parent cpd | aminobenzoic acid | |
| piperidine | azacycloalkane; piperidines; saturated organic heteromonocyclic parent; secondary amine | base; catalyst; human metabolite; non-polar solvent; plant metabolite; protic solvent; reagent | |
| D-proline | D-alpha-amino acid; D-alpha-amino acid zwitterion; proline | mouse metabolite | |
| 4-hydroxybutyric acid | 4-hydroxybutyric acid : A 4-hydroxy monocarboxylic acid that is butyric acid in which one of the hydrogens at position 4 is replaced by a hydroxy group. 4-hydroxybutyric acid: was an entry term to Sodium Oxybate (74-98) | 4-hydroxy monocarboxylic acid; hydroxybutyric acid | general anaesthetic; GHB receptor agonist; neurotoxin; sedative |
| thiazolidines | Thiazolidines: Reduced (protonated) form of THIAZOLES. They can be oxidized to THIAZOLIDINEDIONES. | thiazolidine | |
| dehydroepiandrosterone sulfate | dehydroepiandrosterone sulfate : A steroid sulfate that is the 3-sulfooxy derivative of dehydroepiandrosterone. Dehydroepiandrosterone Sulfate: The circulating form of a major C19 steroid produced primarily by the ADRENAL CORTEX. DHEA sulfate serves as a precursor for TESTOSTERONE; ANDROSTENEDIONE; ESTRADIOL; and ESTRONE. | 17-oxo steroid; steroid sulfate | EC 2.7.1.33 (pantothenate kinase) inhibitor; human metabolite; mouse metabolite |
| azetidyl-2-carboxylic acid | (S)-azetidine-2-carboxylic acid : The (S)-enantiomer of azetidine-2-carboxylic acid. azetidinecarboxylic acid : A member of the class of azetidines that is azetidine substituted by at least one carboxy group at unspecified position. azetidyl-2-carboxylic acid: a proline analog (with 4-membered ring in place of 5); a toxic non-protein amino acid that is misincorporated into protein in place of proline; induces nonfunctional heat-shock proteins; inhibits acquired thermotolerance; RN given refers to (L)-isomer; found in beets and Liliaceae | azetidine-2-carboxylic acid | |
| pyrrolidine | azacycloalkane; pyrrolidines; saturated organic heteromonocyclic parent | ||
| norvaline | L-2-aminopentanoic acid : A 2-aminopentanoic acid that has S-configuration. norvaline: differs from valine in being 1 carbon longer instead of branched; RN given refers to (L)-isomer; structure | 2-aminopentanoic acid; L-alpha-amino acid zwitterion | bacterial metabolite; hypoglycemic agent; neuroprotective agent |
| guanidinopropionic acid | 3-guanidinopropanoic acid : A guanidine compound bearing an N-(2-carboxyethyl) substituent. It is a creatine analogue that has been found to decreases plasma glucose levels guanidinopropionic acid: alters creatine metabolism; structure | guanidines; zwitterion | hypoglycemic agent |
| D-serine | D-alpha-amino acid; serine; serine zwitterion | Escherichia coli metabolite; human metabolite; NMDA receptor agonist | |
| D-alanine | alanine; alanine zwitterion; D-alpha-amino acid | EC 4.3.1.15 (diaminopropionate ammonia-lyase) inhibitor; Escherichia coli metabolite; human metabolite | |
| D-valine | D-valine : The D-enantiomer of valine. | D-alpha-amino acid; D-alpha-amino acid zwitterion; valine | |
| 2-(methylamino)isobutyric acid | alpha-(methylamino)isobutyric acid : A non-proteinogenic alpha-amino acid that is isobutyric acid in which the alpha-hydrogen has been replaced by a methylamino group. | alanine derivative; alpha-amino acid zwitterion; non-proteinogenic alpha-amino acid; secondary amino compound | human urinary metabolite |
| thiazolidine-4-carboxylic acid, (r)-isomer | l-4-thiazolidinecarboxylic acid: structure in first source L-thioproline : An optically active version of thioproline having L-configuration. thioproline : A sulfur-containing amino acid that is proline in which the methylene group at position 4 is replaced by a sulfur atom. | thiazolidinemonocarboxylic acid; thioproline | geroprotector; metabolite |
| methotrexate | dicarboxylic acid; monocarboxylic acid amide; pteridines | abortifacient; antimetabolite; antineoplastic agent; antirheumatic drug; dermatologic drug; DNA synthesis inhibitor; EC 1.5.1.3 (dihydrofolate reductase) inhibitor; immunosuppressive agent | |
| 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 |
| L-cycloserine | L-cycloserine : A 4-amino-1,2-oxazolidin-3-one that has S configuration. An antibiotic isolated from Erwinia uredovora. | 4-amino-1,2-oxazolidin-3-one | anti-HIV agent; anticonvulsant; EC 2.3.1.50 (serine C-palmitoyltransferase) inhibitor |
| prolinol | prolinol : An amino alcohol formed by reduction of the amino acid proline. prolinol: RN given refers to cpd without isomeric designation; structure | ||
| estradiol-17 beta-glucuronide | 17beta-estradiol 17-glucosiduronic acid : A steroid glucosiduronic acid that consists of 17beta-estradiol having a beta-glucuronyl residue attached at position 17 via a glycosidic linkage. | 3-hydroxy steroid; steroid glucosiduronic acid | |
| n-methylalanine | methyl-L-alanine : Any alanine derivative that is L-alanine having one or more methyl groups attached to the amino group. N-methyl-L-alanine : A methyl-L-alanine in which one of the the amino hydrogen of L-alanine is replaced by a methyl group. N-methylalanine: RN given refers to parent cpd(DL-Ala)-isomer | amino acid zwitterion; methyl-L-alanine | |
| r18 peptide | R18 peptide: a 20-mer peptide, derived from a phage library, that binds 14-3-3 tau protein; amino acid sequence in first source |