ryanodine receptor complex
Definition
Target type: cellularcomponent
A voltage-gated calcium-release channel complex of the sarcoplasmic or endoplasmic reticulum. It plays an important role in the excitation-contraction (E-C) coupling of muscle cells. RyR comprises a family of ryanodine receptors, widely expressed throughout the animal kingdom. [GOC:ame, PMID:22822064]
The ryanodine receptor complex (RyR) is a large, multi-protein complex that plays a crucial role in calcium signaling in muscle cells. It is localized to the sarcoplasmic reticulum (SR), a specialized intracellular membrane network that stores calcium. The complex is composed of four identical RyR subunits, each of which is a transmembrane protein with a molecular weight of approximately 565 kDa. Each subunit contains several domains, including a large cytosolic domain that interacts with various regulatory proteins and a transmembrane domain that forms a channel through the SR membrane. The channel is responsible for the release of calcium from the SR into the cytoplasm in response to a variety of stimuli, including depolarization of the muscle membrane, mechanical stress, and signaling molecules. The RyR complex is highly regulated and its activity is influenced by a number of factors, including calcium itself, ATP, phosphorylation, and interaction with other proteins. It is essential for muscle contraction, and mutations in RyR genes can lead to a variety of muscle disorders. The cellular component of the RyR complex is therefore the sarcoplasmic reticulum (SR) membrane. The RyR complex is embedded within the SR membrane, with its cytosolic domain extending into the cytoplasm and its transmembrane domain forming a channel that spans the SR membrane. The complex plays a critical role in the regulation of calcium release from the SR, which is essential for muscle contraction.'
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Proteins (3)
| Protein | Definition | Taxonomy |
|---|---|---|
| Peptidyl-prolyl cis-trans isomerase FKBP1A | [no definition available] | Bos taurus (cattle) |
| Peptidyl-prolyl cis-trans isomerase FKBP1A | A peptidyl-prolyl cis-trans isomerase FKBP1A that is encoded in the genome of human. [PRO:DNx, UniProtKB:P62942] | Homo sapiens (human) |
| Ryanodine receptor 1 | A ryanodine receptor 1 that is encoded in the genome of human. [PRO:DNx, UniProtKB:P21817] | Homo sapiens (human) |
Compounds (13)
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| nevirapine | nevirapine : A dipyridodiazepine that is 5,11-dihydro-6H-dipyrido[3,2-b:2',3'-e][1,4]diazepine which is substituted by methyl, oxo, and cyclopropyl groups at positions 4, 6, and 11, respectively. A non-nucleoside reverse transcriptase inhibitor with activity against HIV-1, it is used in combination with other antiretrovirals for the treatment of HIV infection. Nevirapine: A potent, non-nucleoside reverse transcriptase inhibitor used in combination with nucleoside analogues for treatment of HIV INFECTIONS and AIDS. | cyclopropanes; dipyridodiazepine | antiviral drug; HIV-1 reverse transcriptase inhibitor |
| thiabendazole | Tresaderm: dermatologic soln containing dexamethasone, thiabendazole & neomycin sulfate | 1,3-thiazoles; benzimidazole fungicide; benzimidazoles | antifungal agrochemical; antinematodal drug |
| cycloheximide | cycloheximide : A dicarboximide that is 4-(2-hydroxyethyl)piperidine-2,6-dione in which one of the hydrogens attached to the carbon bearing the hydroxy group is replaced by a 3,5-dimethyl-2-oxocyclohexyl group. It is an antibiotic produced by the bacterium Streptomyces griseus. Cycloheximide: Antibiotic substance isolated from streptomycin-producing strains of Streptomyces griseus. It acts by inhibiting elongation during protein synthesis. | antibiotic fungicide; cyclic ketone; dicarboximide; piperidine antibiotic; piperidones; secondary alcohol | anticoronaviral agent; bacterial metabolite; ferroptosis inhibitor; neuroprotective agent; protein synthesis inhibitor |
| 3-(3-pyridyl)-1-propyl-(2s)-1-(3,3-dimethyl-1,2-dioxopentyl)-2-pyrrolidinecarboxylate | |||
| tacrolimus | tacrolimus (anhydrous) : A macrolide lactam containing a 23-membered lactone ring, originally isolated from the fermentation broth of a Japanese soil sample that contained the bacteria Streptomyces tsukubaensis. Tacrolimus: A macrolide isolated from the culture broth of a strain of Streptomyces tsukubaensis that has strong immunosuppressive activity in vivo and prevents the activation of T-lymphocytes in response to antigenic or mitogenic stimulation in vitro. | macrolide lactam | bacterial metabolite; immunosuppressive agent |
| N-(2-fluorophenyl)-2-[2-(4-thiazolyl)-1-benzimidazolyl]acetamide | benzimidazoles | ||
| biricodar | biricodar: a non-macrocyclic ligand for FKBP12; structure in first source | alpha-amino acid ester | |
| l 683590 | immunomycin: from Streptomyces hygroscopicus; structure given in first source | ether; lactol; macrolide; secondary alcohol | antifungal agent; bacterial metabolite; immunosuppressive agent |
| cyclosporine | ramihyphin A: one of the metabolites produced by Fusarium sp. S-435; RN given refers to cpd with unknown MF | homodetic cyclic peptide | anti-asthmatic drug; anticoronaviral agent; antifungal agent; antirheumatic drug; carcinogenic agent; dermatologic drug; EC 3.1.3.16 (phosphoprotein phosphatase) inhibitor; geroprotector; immunosuppressive agent; metabolite |
| sirolimus | sirolimus : A macrolide lactam isolated from Streptomyces hygroscopicus consisting of a 29-membered ring containing 4 trans double bonds, three of which are conjugated. It is an antibiotic, immunosupressive and antineoplastic agent. Sirolimus: A macrolide compound obtained from Streptomyces hygroscopicus that acts by selectively blocking the transcriptional activation of cytokines thereby inhibiting cytokine production. It is bioactive only when bound to IMMUNOPHILINS. Sirolimus is a potent immunosuppressant and possesses both antifungal and antineoplastic properties. | antibiotic antifungal drug; cyclic acetal; cyclic ketone; ether; macrolide lactam; organic heterotricyclic compound; secondary alcohol | antibacterial drug; anticoronaviral agent; antineoplastic agent; bacterial metabolite; geroprotector; immunosuppressive agent; mTOR inhibitor |
| bastadin 5 | |||
| timcodar | timcodar: a mutlidrug resistance inhibitor; structure in first source | ||
| bastadin 4 |