Page last updated: 2024-10-24
heme transmembrane transporter activity
Definition
Target type: molecularfunction
Enables the transfer of heme from one side of a membrane to the other. [PMID:29549126]
Heme transmembrane transporter activity refers to the movement of heme molecules across biological membranes. Heme, a porphyrin ring complex containing iron, plays a crucial role in various biological processes, including oxygen transport, electron transfer, and catalysis. Heme transmembrane transporters are proteins that facilitate the transport of heme across cellular membranes, ensuring its proper localization and function. These transporters exhibit specificity for heme, discriminating it from other porphyrin compounds. They are often involved in heme biosynthesis, heme degradation, and heme-dependent processes, such as erythropoiesis and mitochondrial respiration. The mechanism of heme transport can vary depending on the transporter, but typically involves the binding of heme to the transporter protein, followed by conformational changes that allow for the movement of heme across the membrane. These transporters play an essential role in maintaining cellular heme homeostasis and enabling critical physiological functions.'
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Proteins (4)
| Protein | Definition | Taxonomy |
|---|---|---|
| Proton-coupled folate transporter | A proton-coupled folate transporter that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q96NT5] | Homo sapiens (human) |
| Proton-coupled folate transporter | A proton-coupled folate transporter that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q96NT5] | Homo sapiens (human) |
| Proton-coupled folate transporter | A proton-coupled folate transporter that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q96NT5] | Homo sapiens (human) |
| Multidrug resistance-associated protein 5 | An ATP-binding cassette sub-family C member 5 that is encoded in the genome of human. [PRO:DNx, UniProtKB:O15440] | Homo sapiens (human) |
Compounds (11)
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| dilazep | dilazep : A member of the class of diazepanes that is 1,4-diazepane substituted by 3-[(3,4,5-trimethoxybenzoyl)oxy]propyl groups at positions 1 and 4. It is a potent adenosine uptake inhibitor that exhibits antiplatelet, antianginal and vasodilator properties. Dilazep: Coronary vasodilator with some antiarrhythmic activity. | benzoate ester; diazepane; diester; methoxybenzenes | cardioprotective agent; platelet aggregation inhibitor; vasodilator agent |
| dipyridamole | dipyridamole : A pyrimidopyrimidine that is 2,2',2'',2'''-(pyrimido[5,4-d]pyrimidine-2,6-diyldinitrilo)tetraethanol substituted by piperidin-1-yl groups at positions 4 and 8 respectively. A vasodilator agent, it inhibits the formation of blood clots. Dipyridamole: A phosphodiesterase inhibitor that blocks uptake and metabolism of adenosine by erythrocytes and vascular endothelial cells. Dipyridamole also potentiates the antiaggregating action of prostacyclin. (From AMA Drug Evaluations Annual, 1994, p752) | piperidines; pyrimidopyrimidine; tertiary amino compound; tetrol | adenosine phosphodiesterase inhibitor; EC 3.5.4.4 (adenosine deaminase) inhibitor; platelet aggregation inhibitor; vasodilator agent |
| sulfinpyrazone | Sulfinpyrazone: A uricosuric drug that is used to reduce the serum urate levels in gout therapy. It lacks anti-inflammatory, analgesic, and diuretic properties. | pyrazolidines; sulfoxide | uricosuric drug |
| trequinsin | trequinsin: RN given refers to parent cpd; structure given in first source | pyridopyrimidine | |
| 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 | |
| 10-propargyl-10-deazaaminopterin | 10-propargyl-10-deazaaminopterin: structure in first source pralatrexate : A pteridine that is the N-4-[1-(2,4-diaminopteridin-6-yl)pent-4-yn-2-yl]benzoyl derivative of L-glutamic acid. Used for treatment of Peripheral T-Cell Lymphoma, an aggressive form of non-Hodgkins lymphoma. | N-acyl-L-glutamic acid; pteridines; terminal acetylenic compound | antimetabolite; antineoplastic agent; EC 1.5.1.3 (dihydrofolate reductase) inhibitor |
| l 660,711 | quinolines | ||
| cyclic gmp | 3',5'-cyclic GMP : A 3',5'-cyclic purine nucleotide in which the purine nucleobase is specified as guanidine. Cyclic GMP: Guanosine cyclic 3',5'-(hydrogen phosphate). A guanine nucleotide containing one phosphate group which is esterified to the sugar moiety in both the 3'- and 5'-positions. It is a cellular regulatory agent and has been described as a second messenger. Its levels increase in response to a variety of hormones, including acetylcholine, insulin, and oxytocin and it has been found to activate specific protein kinases. (From Merck Index, 11th ed) | 3',5'-cyclic purine nucleotide; guanyl ribonucleotide | Escherichia coli metabolite; human metabolite; mouse metabolite; plant metabolite; Saccharomyces cerevisiae metabolite |
| sildenafil | sildenafil : A pyrazolo[4,3-d]pyrimidin-7-one having a methyl substituent at the 1-position, a propyl substituent at the 3-position and a 2-ethoxy-5-[(4-methylpiperazin-1-yl)sulfonyl]phenyl group at the 5-position. | piperazines; pyrazolopyrimidine; sulfonamide | EC 3.1.4.35 (3',5'-cyclic-GMP phosphodiesterase) inhibitor; vasodilator agent |
| raltitrexed | N-acyl-amino acid | ||
| pemetrexed | pemetrexed disodium : An organic sodium salt that is the disodium salt of N-{4-[2-(2-amino-4-oxo-4,7-dihydro-1H-pyrrolo[2,3-d]pyrimidin-5-yl)ethyl]benzoyl}-L-glutamic acid. Inhibits thymidylate synthase (TS), 421 dihydrofolate reductase (DHFR), and glycinamide ribonucleotide formyltransferase (GARFT). | N-acyl-L-glutamic acid; pyrrolopyrimidine | antimetabolite; antineoplastic agent; EC 1.5.1.3 (dihydrofolate reductase) inhibitor; EC 2.1.1.45 (thymidylate synthase) inhibitor; EC 2.1.2.2 (phosphoribosylglycinamide formyltransferase) inhibitor |