MRS2

gene
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Summary

MRS2 (magnesium transporter MRS2, HGNC:13785) is a protein-coding gene on chromosome 6p22.3, encoding Magnesium transporter MRS2 homolog, mitochondrial (Q9HD23). Magnesium transporter that mediates the influx of magnesium into the mitochondrial matrix and regulates magnesium metabolism.

Enables magnesium ion transmembrane transporter activity. Involved in mitochondrial magnesium ion transmembrane transport. Located in mitochondrion.

Source: NCBI Gene 57380 — RefSeq curated summary.

At a glance

  • Clinical variants (ClinVar): 88 total
  • MANE Select transcript: NM_020662

Identifiers

Gene identifiers

FieldValue
HGNC IDHGNC:13785
Approved symbolMRS2
Namemagnesium transporter MRS2
Location6p22.3
Locus typegene with protein product
StatusApproved
Ensembl geneENSG00000124532
Ensembl biotypeprotein_coding
OMIM619307
Entrez57380

Gene structure

Transcript identifiers

Ensembl transcripts: 13 — 12 protein_coding, 1 protein_coding_CDS_not_defined

ENST00000274747, ENST00000378353, ENST00000378386, ENST00000443868, ENST00000446191, ENST00000483634, ENST00000873842, ENST00000873843, ENST00000873844, ENST00000873845, ENST00000873846, ENST00000928434, ENST00000951153

RefSeq mRNA: 4 — MANE Select: NM_020662 NM_001286264, NM_001286265, NM_001286266, NM_020662

CCDS: CCDS4552, CCDS69055, CCDS69056, CCDS75408

Canonical transcript exons

ENST00000378386 — 11 exons

ExonStartEnd
ENSE000018914472442358424426190
ENSE000034673102440946124409573
ENSE000034900842441503324415163
ENSE000035894962440840824408444
ENSE000036112682441639724416513
ENSE000036273922441808424418236
ENSE000036748132440516824405241
ENSE000037352772441846124418578
ENSE000037492102442293724423050
ENSE000037518392441222224412395
ENSE000039013832440293624403236

Expression profiles

Bgee: expression breadth ubiquitous, 285 present calls, max score 91.76.

FANTOM5 (CAGE): breadth ubiquitous, TPM avg 44.6026 / max 568.0897, expressed in 1822 samples.

FANTOM5 promoters (1 alternative TSS)

Promoter IDTPM avgSamples expressed
6638244.60261822

Top tissues by expression

297 total, by Bgee expression score (0-100, higher = more expressed):

TissueAnatomy IDExpression scoreQuality
biceps brachiiUBERON:000150791.76gold quality
skeletal muscle tissue of biceps brachiiUBERON:000450290.65gold quality
gastrocnemiusUBERON:000138890.27gold quality
heart left ventricleUBERON:000208490.16gold quality
muscle of legUBERON:000138390.14gold quality
cardiac ventricleUBERON:000208290.01gold quality
heart right ventricleUBERON:000208089.82gold quality
hindlimb stylopod muscleUBERON:000425289.47gold quality
right atrium auricular regionUBERON:000663189.13gold quality
cerebellar hemisphereUBERON:000224588.75gold quality
right hemisphere of cerebellumUBERON:001489088.62gold quality
cerebellar cortexUBERON:000212988.59gold quality
muscle organUBERON:000163088.55gold quality
skeletal muscle organUBERON:001489288.55gold quality
heartUBERON:000094888.30gold quality
apex of heartUBERON:000209888.21gold quality
right adrenal gland cortexUBERON:003582788.07gold quality
primordial germ cell in gonadCL:0000670 ∩ UBERON:000099187.91gold quality
body of pancreasUBERON:000115087.86gold quality
right adrenal glandUBERON:000123387.32gold quality
cardiac atriumUBERON:000208187.11gold quality
rectumUBERON:000105286.83gold quality
cerebellumUBERON:000203786.73gold quality
left adrenal glandUBERON:000123486.69gold quality
secondary oocyteCL:000065586.40gold quality
endothelial cellCL:000011586.38silver quality
triceps brachiiUBERON:000150986.38silver quality
left adrenal gland cortexUBERON:003582586.32gold quality
pancreasUBERON:000126486.11gold quality
skeletal muscle tissueUBERON:000113485.91gold quality

Single-cell (SCXA)

Detected in 2 experiment(s), a significant marker in 2.

ExperimentMarker?Max mean expression
E-MTAB-8271yes7.28
E-ANND-3yes5.46

Regulation

Is transcription factor: no

miRNA regulators (miRDB)

139 targeting MRS2, top 30 by miRDB confidence (max_score; target_count = how many genes the miRNA targets in total — lower means more specific):

miRNAMax scoreAvg scoremiRNA target_count
HSA-MIR-3163100.0077.238605
HSA-MIR-4795-3P100.0074.624024
HSA-MIR-3924100.0072.092394
HSA-MIR-3613-3P100.0076.367965
HSA-MIR-196A-5P100.0068.16684
HSA-MIR-196B-5P100.0068.16681
HSA-MIR-126-5P100.0072.713180
HSA-MIR-5692A100.0074.406850
HSA-MIR-450099.9972.722367
HSA-MIR-548C-3P99.9974.017587
HSA-LET-7A-5P99.9872.291790
HSA-LET-7B-5P99.9872.311790
HSA-LET-7C-5P99.9872.291790
HSA-LET-7E-5P99.9872.291790
HSA-LET-7F-5P99.9872.561784
HSA-LET-7G-5P99.9872.371784
HSA-LET-7I-5P99.9872.371788
HSA-MIR-98-5P99.9872.331787
HSA-MIR-520D-5P99.9873.344883
HSA-MIR-524-5P99.9873.434882
HSA-MIR-56899.9869.862084
HSA-MIR-27A-3P99.9872.132955
HSA-MIR-27B-3P99.9872.132955
HSA-MIR-998599.9872.112939
HSA-MIR-146A-5P99.9668.93988
HSA-MIR-146B-5P99.9669.13977
HSA-LET-7D-5P99.9671.761632
HSA-MIR-445899.9671.641650
HSA-MIR-302E99.9670.742669
HSA-MIR-4666A-3P99.9671.713434

Literature-anchored findings (GeneRIF, showing 9)

  • hMrs2 is the major transport protein for Mg (+) uptake into mitochondria and that expression of hMrs2 is essential for the maintenance of respiratory complex I and cell viability. (PMID:18384665)
  • By enhanced hsaMrs2p expression, p27 was downregulated whereas cyclinD1 was upregulatedin gastric cancer. (PMID:19242098)
  • Multidrug resistance phenotypes is related to MRS2 mitochondrial magnesium channel. (PMID:19270501)
  • The results indicate regulation of mitochondrial Mg(2+) via MRS2 critically decides cellular energy status and cell vulnerability via regulation of mitochondrial Mg(2+) level in response to physiological stimuli. (PMID:27458051)
  • The human MRS2 magnesium-binding domain is a regulatory feedback switch for channel activity. (PMID:36754568)
  • Molecular basis of Mg[2+] permeation through the human mitochondrial Mrs2 channel. (PMID:37543649)
  • Cryo-EM structures of human magnesium channel MRS2 reveal gating and regulatory mechanisms. (PMID:37938562)
  • Mrs2-mediated mitochondrial magnesium uptake is essential for the regulation of MCU-mediated mitochondrial Ca[2+] uptake and viability. (PMID:38599304)
  • MRS2 missense variation at Asp216 abrogates inhibitory Mg[2+] binding, potentiating cell migration and apoptosis resistance. (PMID:38989547)

Cross-species orthologs

3 orthologs

OrganismSymbolGene ID
danio_reriomrs2ENSDARG00000062872
mus_musculusMrs2ENSMUSG00000021339
rattus_norvegicusMrs2ENSRNOG00000017545

Protein

Protein identifiers

Magnesium transporter MRS2 homolog, mitochondrialQ9HD23 (reviewed: Q9HD23)

Alternative names: MRS2-like protein

All UniProt accessions (3): Q9HD23, A0A0A0MQX2, H7BZ29

UniProt curated annotations — full annotation on UniProt →

Function. Magnesium transporter that mediates the influx of magnesium into the mitochondrial matrix and regulates magnesium metabolism. Also permeable to calcium, sodium and potassium ions. Required for normal expression of the mitochondrial respiratory complex I subunits. May play a role in maintaining the inner mitochondrial membrane potential.

Subunit / interactions. Homopentamer.

Subcellular location. Mitochondrion inner membrane.

Activity regulation. May be regulated by calcium ions.

Domain organisation. The GMN motif acts as an ion selectivity filter.

Miscellaneous. Has the ability to complement a deletion of MRS2 in S.cerevisiae and partly restore mitochondrial magnesium concentrations.

Similarity. Belongs to the CorA metal ion transporter (MIT) (TC 1.A.35) family.

Isoforms (4)

UniProt IDNamesCanonical?
Q9HD23-11yes
Q9HD23-22
Q9HD23-33
Q9HD23-44

RefSeq proteins (4): NP_001273193, NP_001273194, NP_001273195, NP_065713* (*=MANE)

Domains & families (InterPro)

IDNameType
IPR039204MRS2-likeFamily

Pfam: PF22099

UniProt features (45 total): strand 12, helix 10, binding site 7, splice variant 5, topological domain 3, sequence variant 2, transmembrane region 2, transit peptide 1, chain 1, turn 1, short sequence motif 1

Structure

Experimental structures (PDB)

9 structures.

PDBMethodResolution (Å)
8IP5ELECTRON MICROSCOPY2.5
8IP3ELECTRON MICROSCOPY2.6
8IP4ELECTRON MICROSCOPY2.7
8TULELECTRON MICROSCOPY2.8
8IP6ELECTRON MICROSCOPY2.9
8TS1ELECTRON MICROSCOPY2.92
8TS2ELECTRON MICROSCOPY2.95
8TS3ELECTRON MICROSCOPY3.11
8TUPELECTRON MICROSCOPY3.3

Predicted structure (AlphaFold)

ModelpLDDTFraction very-high
AF-Q9HD23-F171.970.34

Functional residue map

Curated UniProt residues grouped by drug-discovery relevance — catalytic, ligand-binding, modification, and mutation-validated positions. Source: UniProtKB sequence features.

Ligand- & substrate-binding residues (7): 247; 312; 329; 360; 362; 243; 246

Function

Pathways and Gene Ontology

Reactome pathways

2 pathways

IDPathway
R-HSA-5223345Miscellaneous transport and binding events
R-HSA-382551Transport of small molecules

MSigDB gene sets: 151 (showing top): GSE45365_NK_CELL_VS_CD8A_DC_MCMV_INFECTION_DN, WANG_CLIM2_TARGETS_UP, GOBP_MAGNESIUM_ION_TRANSPORT, GOBP_MONOCARBOXYLIC_ACID_METABOLIC_PROCESS, GOBP_MONOATOMIC_CATION_TRANSPORT, GOCC_MITOCHONDRIAL_ENVELOPE, LIAO_METASTASIS, GOBP_ORGANIC_ACID_METABOLIC_PROCESS, TIEN_INTESTINE_PROBIOTICS_24HR_UP, GRYDER_PAX3FOXO1_ENHANCERS_IN_TADS, GOBP_TRANSMEMBRANE_TRANSPORT, NUYTTEN_EZH2_TARGETS_DN, GRYDER_PAX3FOXO1_TOP_ENHANCERS, GOCC_ORGANELLE_INNER_MEMBRANE, ZHENG_BOUND_BY_FOXP3

GO Biological Process (4): lactate metabolic process (GO:0006089), mitochondrial magnesium ion transmembrane transport (GO:0045016), transmembrane transport (GO:0055085), monoatomic ion transport (GO:0006811)

GO Molecular Function (3): magnesium ion transmembrane transporter activity (GO:0015095), metal ion binding (GO:0046872), protein binding (GO:0005515)

GO Cellular Component (3): mitochondrion (GO:0005739), mitochondrial inner membrane (GO:0005743), membrane (GO:0016020)

Reactome top-level categories

Rollup of top-1 pathways:

CategoryPathways
Transport of small molecules1

GO top-level categories

Rollup of top GO terms by namespace:

CategoryTerms
magnesium ion transmembrane transport2
transport2
monocarboxylic acid metabolic process1
cellular process1
metal ion transmembrane transporter activity1
cation binding1
binding1
cytoplasm1
intracellular membrane-bounded organelle1
organelle inner membrane1
mitochondrial membrane1
cellular anatomical structure1

Protein interactions and networks

STRING

894 interactions, top by confidence (×1000):

Protein AProtein BPartner UniProtScore
MRS2PANX1Q96RD7772
MRS2SLC41A1Q8IVJ1761
MRS2SLC41A3Q96GZ6695
MRS2SLC41A2Q96JW4692
MRS2TRPM6Q9BX84655
MRS2MAGT1Q9H0U3645
MRS2TRPM7Q96QT4599
MRS2CNNM2Q9H8M5598
MRS2HPP00737592
MRS2MMGT1Q8N4V1560
MRS2NIPAL1Q6NVV3541
MRS2NIPAL3Q6P499515
MRS2NIPA2Q8N8Q9508
MRS2CNNM1Q9NRU3505
MRS2P0DN79P0DN79493

IntAct

125 interactions, top by confidence:

ABTypeScore
TBC1D9ABHD16Apsi-mi:“MI:0914”(association)0.640
NIPAL1ESYT2psi-mi:“MI:0914”(association)0.640
BZW2ENDOD1psi-mi:“MI:0914”(association)0.640
RSRP1C1QBPpsi-mi:“MI:0914”(association)0.640
RSRP1PSME3psi-mi:“MI:0914”(association)0.640
BZW2MUL1psi-mi:“MI:0914”(association)0.640
SLC39A5TMEM223psi-mi:“MI:0914”(association)0.530
LPAR1TMEM223psi-mi:“MI:0914”(association)0.530
IPPKTMEM223psi-mi:“MI:0914”(association)0.530
HTR2CKLRG2psi-mi:“MI:0914”(association)0.530
SPPL2BUQCRQpsi-mi:“MI:0914”(association)0.530
GSDMESLC27A2psi-mi:“MI:0914”(association)0.530
BZW2SLC27A2psi-mi:“MI:0914”(association)0.530
NGEFPRKCIpsi-mi:“MI:0914”(association)0.530
KCMF1IDH2psi-mi:“MI:0914”(association)0.530
TSPYL1GPC3psi-mi:“MI:0914”(association)0.530
LPAR1TMEM120Bpsi-mi:“MI:0914”(association)0.530
JPH4ZSWIM8psi-mi:“MI:0914”(association)0.530
TBC1D15MYO9Apsi-mi:“MI:0914”(association)0.530
SYPAPBB1psi-mi:“MI:0914”(association)0.530
NOL9IPO5psi-mi:“MI:0914”(association)0.530
VTNHAT1psi-mi:“MI:0914”(association)0.530

BioGRID (123): MRS2 (Affinity Capture-MS), MRS2 (Affinity Capture-MS), MRS2 (Affinity Capture-MS), MRS2 (Affinity Capture-MS), MRS2 (Affinity Capture-MS), MRS2 (Affinity Capture-MS), MRS2 (Affinity Capture-MS), MRS2 (Affinity Capture-MS), MRS2 (Affinity Capture-MS), MRS2 (Affinity Capture-MS), MRS2 (Affinity Capture-MS), MRS2 (Affinity Capture-MS), MRS2 (Affinity Capture-MS), MRS2 (Affinity Capture-MS), MRS2 (Affinity Capture-MS)

ESM2 similar proteins: A2WXD3, A2WY50, A2XV81, A2YFN7, A2YTP9, A2Z9W7, A3BV82, B8APK3, O81770, P0CZ21, P0CZ22, P93115, Q01JR9, Q0DWQ1, Q0JBZ6, Q304A0, Q43847, Q4R4M1, Q5NCE8, Q5R447, Q5VP70, Q651V6, Q67UL3, Q67UQ7, Q69QJ7, Q6UTZ2, Q7SFQ9, Q7XE48, Q7XQQ1, Q8L4S2, Q8S1N1, Q93ZD7, Q9AUK4, Q9ET09, Q9FLG2, Q9FZL3, Q9FZL4, Q9HD23, Q9LJN2, Q9LPC5

Diamond homologs: Q4R4M1, Q5NCE8, Q5R447, Q9ET09, Q9HD23, Q9LJN2, Q02783, Q6C8H7, P0CZ22, P87149, Q01926, Q4I298, Q4WCV3, Q59S85, Q5A970, Q6BX67, Q6C2P2, Q6CIB3, Q6CLJ5, Q6FJD1, Q6FV22, Q759B8, Q75A69, Q7SFQ9, Q8IIG4, A2WXD3, A2WY50, A2XCA0, A2XV81, A2YFN7, A2Z9W7, A3BV82, B8AJT9, P0CZ21, Q01JR9, Q0JBZ6, Q10D38, Q10S25, Q1PE39, Q304A0

SIGNOR signaling

0 interactions.

Enriched among interaction partners

Reactome pathways and GO biological processes over-represented among this gene’s 159 IntAct physical interaction partners (hypergeometric vs the genome-wide background, BH-FDR, gene-set size 15–500, ranked by fold). A functional readout of the neighbourhood — distinct from this gene’s own memberships above, and biased toward well-studied / hub proteins, so read it as themes rather than proof.

Reactome pathways:

PathwayPartnersFoldFDR
Peptide chain elongation78.2×2e-03
Viral mRNA Translation78.2×2e-03
PELO:HBS1L and ABCE1 dissociate a ribosome on a non-stop mRNA78.1×2e-03
Influenza Infection58.1×9e-03
Selenocysteine synthesis77.7×2e-03
Eukaryotic Translation Termination77.7×2e-03
Nonsense Mediated Decay (NMD) independent of the Exon Junction Complex (EJC)77.6×2e-03
ZNF598 and the Ribosome-associated Quality Trigger (RQT) complex dissociate a ribosome stalled on a no-go mRNA77.6×2e-03

Disease & clinical

Clinical variants and AI predictions

ClinVar

88 variants total. Per-class counts are floors (≥ shown; pagination cap):

ClassificationCount (floor)
Pathogenic0
Likely pathogenic0
Uncertain significance59
Likely benign1
Benign0

Top pathogenic / likely-pathogenic (0)

SpliceAI

1819 predictions. Top by Δscore:

VariantEffectΔscore
6:24405238:TGTGG:Tdonor_loss1.0000
6:24405239:GTG:Gdonor_gain1.0000
6:24405240:TGGTG:Tdonor_loss1.0000
6:24405241:GGT:Gdonor_loss1.0000
6:24405242:G:Adonor_loss1.0000
6:24405243:T:Gdonor_loss1.0000
6:24408406:A:AGacceptor_gain1.0000
6:24408407:G:GGacceptor_gain1.0000
6:24408407:GAC:Gacceptor_gain1.0000
6:24408407:GACA:Gacceptor_gain1.0000
6:24408407:GACAA:Gacceptor_gain1.0000
6:24408444:GGT:Gdonor_loss1.0000
6:24408445:G:GAdonor_loss1.0000
6:24408446:T:Adonor_loss1.0000
6:24408447:G:GGdonor_loss1.0000
6:24412220:A:AGacceptor_gain1.0000
6:24412221:G:GGacceptor_gain1.0000
6:24416394:TA:Tacceptor_loss1.0000
6:24416395:A:AGacceptor_gain1.0000
6:24416395:AGTC:Aacceptor_loss1.0000
6:24416396:G:GTacceptor_gain1.0000
6:24416396:GT:Gacceptor_gain1.0000
6:24416396:GTCT:Gacceptor_gain1.0000
6:24416509:GTCTT:Gdonor_gain1.0000
6:24416510:TCTT:Tdonor_gain1.0000
6:24416511:CTT:Cdonor_gain1.0000
6:24416511:CTTGT:Cdonor_loss1.0000
6:24416512:TT:Tdonor_gain1.0000
6:24416512:TTG:Tdonor_loss1.0000
6:24416513:TGTAA:Tdonor_loss1.0000

AlphaMissense

2882 scored. Top likely-pathogenic:

VariantProtein changeam_pathogenicity
6:24422982:A:CS385R1.000
6:24422984:T:AS385R1.000
6:24422984:T:GS385R1.000
6:24418466:G:CR332P0.999
6:24418490:T:CL340P0.999
6:24418496:T:CL342P0.999
6:24416399:T:CL241P0.998
6:24418504:G:AG345R0.998
6:24418504:G:CG345R0.998
6:24418537:G:AG356R0.998
6:24418537:G:CG356R0.998
6:24422979:G:AG384R0.998
6:24422979:G:CG384R0.998
6:24422986:G:AG386D0.998
6:24422994:T:AW389R0.998
6:24422994:T:CW389R0.998
6:24418505:G:AG345E0.997
6:24418528:G:AG353R0.997
6:24418528:G:CG353R0.997
6:24418529:G:AG353E0.997
6:24418544:C:AA358D0.997
6:24418550:G:AG360E0.997
6:24418554:G:AM361I0.997
6:24418554:G:CM361I0.997
6:24418554:G:TM361I0.997
6:24422949:T:CF374L0.997
6:24422951:T:AF374L0.997
6:24422951:T:GF374L0.997
6:24422964:G:AG379R0.997
6:24422964:G:CG379R0.997

dbSNP variants (sampled 300 via entrez): RS1000313054 (6:24410612 G>C), RS1000426842 (6:24404819 G>A), RS1000475260 (6:24404644 G>T), RS1000499126 (6:24416929 T>C), RS1000671974 (6:24417417 ATTTTG>A), RS1000761453 (6:24404430 A>G), RS1000845127 (6:24420835 G>A,T), RS1000869067 (6:24409021 A>C), RS1000981613 (6:24409341 G>A,T), RS1001011614 (6:24420833 T>C), RS1001174790 (6:24426319 C>G,T), RS1001432206 (6:24414891 C>A,T), RS1001545964 (6:24419727 C>G,T), RS1001792109 (6:24418406 G>A), RS1001838816 (6:24414455 A>C,G)

Disease associations

OMIM: gene MIM:619307 | disease phenotypes:

GenCC curated gene-disease

Mondo (0):

Orphanet (0):

HPO phenotypes

0 total (0 of 0 shown, HPO-id order):

GWAS associations

0 associations (top):

Drugs & pharmacology

Drug and pharmacology data

Is drug target: no

PharmGKB: 1 entry (VIP=true, CPIC=false)

CTD chemical–gene interactions

23 total (human), top 23 by PubMed support.

ChemicalActions (top 5)PubMed papers
Valproic Acidaffects cotreatment, increases expression, affects expression, decreases expression7
sodium arseniteincreases expression, decreases expression, affects cotreatment, increases abundance2
Phenylmercuric Acetateincreases expression, affects cotreatment2
triphenyl phosphateaffects expression1
nickel chloridedecreases expression1
manganese chlorideaffects cotreatment, increases abundance, increases expression1
di-n-butylphosphoric acidaffects expression1
4-(5-benzo(1,3)dioxol-5-yl-4-pyridin-2-yl-1H-imidazol-2-yl)benzamideaffects cotreatment, increases expression1
dorsomorphinaffects cotreatment, increases expression1
Temozolomideincreases expression1
Acetaminophendecreases expression1
Air Pollutantsaffects expression, increases abundance1
Arsenicaffects cotreatment, increases abundance, increases expression1
Doxorubicindecreases expression1
Manganeseaffects cotreatment, increases abundance, increases expression1
Mercuric Chloridedecreases expression1
Ozoneaffects expression, increases abundance1
Thiramdecreases expression1
Isotretinoindecreases expression1
Cyclosporinedecreases expression1
Copper Sulfatedecreases expression1
Lactic Aciddecreases expression1
Vitamin K 3affects expression1

Clinical trials (associated diseases)

0 trials via MONDO — disease-level, not drug-specific.

No linked Atlas pages yet — the cross-entity mesh grows as the corpus expands.