postsynaptic endocytic zone
Definition
Target type: cellularcomponent
A stably positioned site of clathrin adjacent and physically attached to the postsynaptic specialization, which is the site of endocytosis of post-synaptic proteins. [PMID:17880892]
The postsynaptic endocytic zone is a specialized region of the plasma membrane at the synapse, responsible for the internalization of neurotransmitter receptors and other molecules following synaptic activity. It is a highly dynamic structure, constantly assembling and disassembling in response to synaptic signaling. The key components of the postsynaptic endocytic zone include:
- **Clathrin-coated pits:** These are invaginations of the plasma membrane coated with the protein clathrin. Clathrin-coated pits are the primary sites of endocytosis, and they play a critical role in the internalization of neurotransmitter receptors.
- **Adaptor proteins:** These proteins, such as AP-2, bind to clathrin and to transmembrane receptors, linking the receptors to the clathrin coat. Adaptor proteins also recruit other proteins involved in endocytosis, such as dynamin.
- **Dynamin:** This GTPase protein is responsible for pinching off clathrin-coated vesicles from the plasma membrane. It forms a ring around the neck of the budding vesicle and uses the energy from GTP hydrolysis to constrict the ring and sever the vesicle from the membrane.
- **Other proteins:** In addition to these core components, many other proteins are involved in the regulation of endocytosis at the postsynaptic endocytic zone. These include proteins that regulate the assembly and disassembly of clathrin-coated pits, proteins that control the recruitment of receptors to the endocytic zone, and proteins that mediate the signaling pathways that regulate endocytosis.
- **Scaffolding proteins:** These proteins, such as PSD-95 and GKAP, play a role in organizing the postsynaptic endocytic zone and linking it to other components of the synapse, such as the postsynaptic density.
- **Lipid rafts:** These specialized microdomains of the plasma membrane are enriched in cholesterol and sphingolipids. Lipid rafts are thought to play a role in the clustering of neurotransmitter receptors and other signaling molecules at the synapse.
- **Actin filaments:** These cytoskeletal proteins are involved in the movement and trafficking of clathrin-coated vesicles and other components of the endocytic zone.
The postsynaptic endocytic zone is a complex and highly regulated structure that plays a critical role in the regulation of synaptic function. Its ability to internalize and recycle neurotransmitter receptors is essential for maintaining synaptic plasticity and ensuring proper signal transmission.'
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Proteins (1)
| Protein | Definition | Taxonomy |
|---|---|---|
| Glutamate receptor 2 | A glutamate receptor 2 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P42262] | Homo sapiens (human) |
Compounds (59)
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| aminolevulinic acid | 5-aminolevulinic acid : The simplest delta-amino acid in which the hydrogens at the gamma position are replaced by an oxo group. It is metabolised to protoporphyrin IX, a photoactive compound which accumulates in the skin. Used (in the form of the hydrochloride salt)in combination with blue light illumination for the treatment of minimally to moderately thick actinic keratosis of the face or scalp. Aminolevulinic Acid: A compound produced from succinyl-CoA and GLYCINE as an intermediate in heme synthesis. It is used as a PHOTOCHEMOTHERAPY for actinic KERATOSIS. | 4-oxo monocarboxylic acid; amino acid zwitterion; delta-amino acid | antineoplastic agent; dermatologic drug; Escherichia coli metabolite; human metabolite; mouse metabolite; photosensitizing agent; plant metabolite; prodrug; Saccharomyces cerevisiae metabolite |
| 5-aminovaleric acid | 5-aminopentanoic acid : A delta-amino acid comprising pentanoic acid with an amino substituent at C-5; a methylene homologue of gamma-aminobutyric acid (GABA) that is a weak GABA agonist. 5-aminovaleric acid: from red fox anal secretion; RN given refers to parent cpd | amino acid zwitterion; delta-amino acid; omega-amino fatty acid | human metabolite |
| alanylalanine | alanylalanine: RN given refers to (DL)-isomer | dipeptide | |
| alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid | alpha-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic Acid: An IBOTENIC ACID homolog and glutamate agonist. The compound is the defining agonist for the AMPA subtype of glutamate receptors (RECEPTORS, AMPA). It has been used as a radionuclide imaging agent but is more commonly used as an experimental tool in cell biological studies. | non-proteinogenic alpha-amino acid | |
| cyclothiazide | cyclothiazide : 3,4-Dihydro-2H-1,2,4-benzothiadiazine 1,1-dioxide substituted at positions 3, 5 and 6 by a 2-norbornen-5-yl group, chlorine, and a sulfonamide group, respectively. A thiazide diuretic, it has been used in the management of hypertension and oedema. cyclothiazide: inhibits the desensitization of AMPA-type receptors; structure | benzothiadiazine | antihypertensive agent; diuretic |
| gyki 52466 | GYKI 52466: an AMPA (non-NMDA) receptor antagonist; structure given in first source | benzodiazepine | |
| kainic acid | Kainic Acid: (2S-(2 alpha,3 beta,4 beta))-2-Carboxy-4-(1-methylethenyl)-3-pyrrolidineacetic acid. Ascaricide obtained from the red alga Digenea simplex. It is a potent excitatory amino acid agonist at some types of excitatory amino acid receptors and has been used to discriminate among receptor types. Like many excitatory amino acid agonists it can cause neurotoxicity and has been used experimentally for that purpose. | dicarboxylic acid; L-proline derivative; non-proteinogenic L-alpha-amino acid; pyrrolidinecarboxylic acid | antinematodal drug; excitatory amino acid agonist |
| glycylglycine | dipeptide; dipeptide zwitterion | human metabolite | |
| glutamic acid | glutamic acid : An alpha-amino acid that is glutaric acid bearing a single amino substituent at position 2. Glutamic Acid: A non-essential amino acid naturally occurring in the L-form. Glutamic acid is the most common excitatory neurotransmitter in the CENTRAL NERVOUS SYSTEM. | glutamic acid; glutamine family amino acid; L-alpha-amino acid; proteinogenic amino acid | Escherichia coli metabolite; ferroptosis inducer; micronutrient; mouse metabolite; neurotransmitter; nutraceutical |
| selfotel | selfotel: a N-methyl-D-aspartate (NMDA) antagonist; used to treat stroke-induced impairment | non-proteinogenic alpha-amino acid | |
| leucyl-alanine | Leu-Ala : A dipeptide composed of L-leucine and L-alanine joined by a peptide linkage. | dipeptide | metabolite |
| alanylproline | alanylproline: RN given refers to all (L)-isomer | dipeptide; dipeptide zwitterion | metabolite |
| glycylleucine | Gly-Leu : A dipeptide composed of glycine and L-leucine joined by a peptide linkage. | dipeptide; dipeptide zwitterion | metabolite |
| alanyltyrosine | Ala-Tyr : A dipeptide composed of L-alanine and L-tyrosine joined by a peptide linkage. alanyltyrosine: tyrosine source; RN given refers to (L)-isomer | dipeptide | metabolite |
| glycylsarcosine | glycylsarcosine : A dipeptide obtained by formal condensation of the carboxy group of glycine with the amino group of sarcosine. | dipeptide; dipeptide zwitterion | |
| glycylaspartic acid | glycylaspartic acid: RN given refers to (L)-isomer | dipeptide | metabolite |
| histidinoalanine | histidinoalanine: cross-linking amino acid in calcified tissue collagen; RN given refers to (L)-isomer | dipeptide; dipeptide zwitterion | metabolite |
| argiotoxin-636 | argiotoxin-636: from the venom of Argiope aurantia; blocks neuromuscular transmission in insects; structure in first source. | N-acyl-amino acid | |
| 2-amino-3-(3-(carboxymethoxy)-5-methylisoxazol-4-yl)propionic acid | 2-amino-3-(3-(carboxymethoxy)-5-methylisoxazol-4-yl)propionic acid: glutamate receptor antagonist; protects against kainic acid neurotoxicity in cultured cerebral cortex neurons | ||
| 5-fluorowillardiine | 3-(5-fluorouracil-1-yl)-L-alanine : An alanine derivative that is L-alanine bearing a 5-fluorouracil-1-yl substituent at position 3. A more potent and selective AMPA receptor agonist (at hGluR1 and hGluR2) than AMPA itself (Ki = 14.7, 25.1, and 1820 nM for hGluR1, hGluR2 and hGluR5 respectively). 5-fluorowillardiine: a glutamate agonist; RN given for (S)-isomer | L-alanine derivative; non-proteinogenic L-alpha-amino acid; organofluorine compound | AMPA receptor agonist |
| gyki 53655 | GYKI 53655: an AMPA (alpha-amino-3-hydroxy-5-methylisoxazole-4-propionate) receptor antagonist | ||
| ly 293558 | tezampanel: structure given in first source; an AMPA receptor antagonist | ||
| alanylglutamic acid | alanylglutamic acid: RN given refers to (L)-isomer L-alanyl-L-glutamic acid : A dipeptide consisting of L-glutamic acid having an L-alanyl attached to its alpha-amino group | dipeptide | |
| prolyl-tyrosine | Pro-Tyr : A dipeptide formed from L-proline and L-tyrosine residues. prolyl-tyrosine: structure given in first source | dipeptide | metabolite |
| alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid | |||
| 5-bromowillardiine | 5-bromowillardiine: acts as a kainate-like agonist on chick EAA receptors expressed in Xenopus oocytes; RN given refers to (S)-isomer; RN for cpd without isomeric designation not avail 5/91 | ||
| prolylglutamic acid | Pro-Glu : A dipeptide formed from L-proline and L-glutamic acid residues. | dipeptide | metabolite |
| cysteinylglycine | cysteinylglycine: RN given refers to (L)-isomer; RN for cpd without isomeric designation not in Chemlne 7/13/83 L-cysteinylglycine : A dipeptide consisting of glycine having an L-cysteinyl attached to its alpha-amino group. It is an intermediate metabolite in glutathione metabolism. | dipeptide; dipeptide zwitterion | Escherichia coli metabolite; human metabolite; Saccharomyces cerevisiae metabolite |
| willardiine | 3-(uracil-1-yl)-L-alanine : The 3-(uracil-1-yl) derivative of L-alanine. willardiine: isolated from seeds of Acacia willariana; structure | amino acid zwitterion; L-alanine derivative; non-proteinogenic L-alpha-amino acid | |
| aspartyl-aspartic acid | Asp-Asp : A dipeptide formed from two L-aspartic acid units. aspartyl-aspartic acid: do not confuse with cyclo(Asp-Asp) | dipeptide | Mycoplasma genitalium metabolite |
| ly382884 | benzoic acids | ||
| 4-bromohomoibotenic acid, (rs)-isomer | |||
| glycylproline | Gly-Pro : A dipeptide consisting of L-proline having a glycyl residue attached to its alpha-amino group. | dipeptide; dipeptide zwitterion | metabolite |
| 2,3-dioxo-6-nitro-7-sulfamoylbenzo(f)quinoxaline | 2,3-dioxo-6-nitro-7-sulfamoylbenzo(f)quinoxaline: structure given in first source; neuroprotectant for cerebral ischemia; AMPA receptor antagonist | naphthalenes; sulfonic acid derivative | |
| 6-cyano-7-nitroquinoxaline-2,3-dione | 6-Cyano-7-nitroquinoxaline-2,3-dione: A potent excitatory amino acid antagonist with a preference for non-NMDA iontropic receptors. It is used primarily as a research tool. | quinoxaline derivative | |
| fg 9041 | FG 9041: structure given in first source | quinoxaline derivative | |
| seryl-proline | Ser-Pro : A dipeptide formed from L-serine and L-proline residues. | dipeptide | metabolite |
| lofepramine hydrochloride | |||
| phenylalanylalanine | Phe-Ala : A dipeptide formed from L-phenylalanine and L-alanine residues. phenylalanylalanine: RN given refers to (L)-isomer | dipeptide; dipeptide zwitterion | metabolite |
| acetylalanylalanine | acetylalanylalanine: RN given refers to (D)-isomer | ||
| alpha-aspartylalanine | alpha-aspartylalanine: found in pig brain Asp-Ala : A dipeptide formed from L-alpha-aspartyl and L-valine residues. | dipeptide | metabolite |
| alanyltyrosine | Tyr-Ala : A dipeptide formed from L-tyrosine and L-alanine residues. | dipeptide | metabolite |
| ubp 310 | UBP 310: a GluR5 antagonist; structure in first source | ||
| ubp 302 | |||
| prolylglycine | L-prolylglycine : A dipeptide consisting of glycine having an L-prolyl group attached to its alpha-amino nitrogen. prolylglycine: RN given refers to (L)-isomer | dipeptide; dipeptide zwitterion | |
| glutamylalanine | Glu-Ala : A dipeptide formed from L-alpha-glutamyl and L-alanine residues. | dipeptide | metabolite |
| phenylalanylphenylalanine | Phe-Phe : A dipeptide formed from two L-phenylalanine residues. | dipeptide; L-aminoacyl-L-amino acid zwitterion | human blood serum metabolite; Mycoplasma genitalium metabolite |
| phenylalanyl-valine | Val-Phe : A dipeptide formed from L-valine and L-phenylalanine residues. | dipeptide | metabolite |
| alanylglycine | dipeptide; dipeptide zwitterion | metabolite | |
| valyltyrosine | Val-Tyr : A dipeptide formed from L-valine and L-tyrosine residues. valyltyrosine: from sardine muscle hydrolyzate | dipeptide | metabolite |
| phenylalanylproline | Phe-Pro : A dipeptide formed from L-phenylalanine and L-proline residues. | dipeptide | metabolite |
| glycylhistidine | Gly-His : A dipeptide composed of glycine and L-histidine joined by a peptide linkage. glycylhistidine: RN given refers to (L)-isomer | dipeptide; dipeptide zwitterion | metabolite |
| prolyl-serine | Pro-Ser : A dipeptide formed from L-proline and L-serine residues. | dipeptide | metabolite |
| prolylvaline | Val-Pro : A dipeptide formed from L-valine and L-proline residues. | dipeptide | metabolite |
| tqx 173 | |||
| ly 404187 | LY 404187: structure in first source | ||
| 6-azido-7-nitro-1,4-dihydroquinoxaline-2,3-dione | 6-azido-7-nitro-1,4-dihydroquinoxaline-2,3-dione: structure in first source | ||
| 4-ethyl-7-fluoro-3,4-dihydro-2h-1,2,4-benzothiadiazine 1,1-dioxide | 4-ethyl-7-fluoro-3,4-dihydro-2H-1,2,4-benzothiadiazine 1,1-dioxide: an AMPA modulator; structure in first source | ||
| 4-cyclopropyl-7-fluoro-3,4-dihydro-2h-1,2,4-benzothiadiazine 1,1-dioxide | 4-cyclopropyl-7-fluoro-3,4-dihydro-2H-1,2,4-benzothiadiazine 1,1-dioxide: a GluA2 positive allosteric modulator; structure in first source |