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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)

ProteinDefinitionTaxonomy
Proton-coupled folate transporterA proton-coupled folate transporter that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q96NT5]Homo sapiens (human)
Proton-coupled folate transporterA proton-coupled folate transporter that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q96NT5]Homo sapiens (human)
Proton-coupled folate transporterA proton-coupled folate transporter that is encoded in the genome of human. [PRO:DNx, UniProtKB:Q96NT5]Homo sapiens (human)
Multidrug resistance-associated protein 5An 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)

CompoundDefinitionClassesRoles
dilazepdilazep : 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
dipyridamoledipyridamole : 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
sulfinpyrazoneSulfinpyrazone: 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
trequinsintrequinsin: RN given refers to parent cpd; structure given in first sourcepyridopyrimidine
methotrexatedicarboxylic 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-deazaaminopterin10-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 660,711quinolines
cyclic gmp3',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
sildenafilsildenafil : 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
raltitrexedN-acyl-amino acid
pemetrexedpemetrexed 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