Q9BX84 (TRPM6_HUMAN) Reviewed, UniProtKB/Swiss-Prot
Last modified
May 1, 2013.
Version 102.
History...
Names·Attributes·General annotation·Ontologies·Alt products·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize order
Names·Attributes·General annotation·Ontologies·Alt products·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize orderNames and origin
| Protein names | Recommended name: Transient receptor potential cation channel subfamily M member 6 EC=2.7.11.1 Alternative name(s): Channel kinase 2 Melastatin-related TRP cation channel 6 | ||||
| Gene names |
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| Organism | Homo sapiens (Human) [Reference proteome] | ||||
| Taxonomic identifier | 9606 [NCBI] | ||||
| Taxonomic lineage | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Primates › Haplorrhini › Catarrhini › Hominidae › Homo![]() |
Protein attributes
| Sequence length | 2022 AA. |
| Sequence status | Complete. |
| Protein existence | Evidence at protein level |
General annotation (Comments)
| Function | Essential ion channel and serine/threonine-protein kinase. Crucial for magnesium homeostasis. Has an important role in epithelial magnesium transport and in the active magnesium absorption in the gut and kidney. Isoforms of the type M6-kinase lack the ion channel region. |
| Catalytic activity | ATP + a protein = ADP + a phosphoprotein. |
| Subunit structure | Forms heterodimers with TRPM7. TRPM6 requires the presence of TRPM7 to be targeted to the cell membrane (in HEK 293 cells). Interacts (via kinase domain) with GNB2L1/RACK1. Ref.3 Ref.5 |
| Subcellular location | |
| Tissue specificity | Highly expressed in kidney and colon. Isoform TRPM6a and isoform TRPM6b, are coexpressed with TRPM7 in kidney, and testis, and are also found in several cell lines of lung origin. Isoform TRPM6c is detected only in testis and in NCI-H510A small cell lung carcinoma cells. |
| Involvement in disease | Hypomagnesemia 1 (HOMG1) [MIM:602014]: A disorder due to a primary defect in intestinal magnesium absorption. It is characterized by low levels of serum magnesium alongside with a normal renal magnesium secretion, secondary hypocalcemia and calcinocis. Affected individuals show neurologic symptoms of hypomagnesemic hypocalcemia, including seizures and muscle spasms, during infancy. Hypocalcemia is secondary to parathyroid failure resulting from magnesium deficiency. Untreated, the disorder may be fatal or may result in neurological damage. |
| Sequence similarities | In the C-terminal section; belongs to the protein kinase superfamily. Alpha-type protein kinase family. ALPK subfamily. In the N-terminal section; belongs to the transient receptor (TC 1.A.4) family. LTrpC subfamily. TRPM6 sub-subfamily. [View classification] Contains 1 alpha-type protein kinase domain. |
Ontologies
Alternative products
| This entry describes 7 isoforms produced by alternative splicing. [Align] [Select] | ||||||
| Isoform TRPM6a (identifier: Q9BX84-1) This isoform has been chosen as the 'canonical' sequence. All positional information in this entry refers to it. This is also the sequence that appears in the downloadable versions of the entry. | ||||||
| Isoform TRPM6b (identifier: Q9BX84-2) The sequence of this isoform differs from the canonical sequence as follows: 1-11: MKEQPVLERLQ → MIILSK | ||||||
| Isoform TRPM6c (identifier: Q9BX84-3) The sequence of this isoform differs from the canonical sequence as follows: 1-11: MKEQPVLERLQ → MTAPVT | ||||||
| Isoform TRPM6t (identifier: Q9BX84-4) The sequence of this isoform differs from the canonical sequence as follows: 1926-1943: GVGENLTDPSVIKPEVKQ → ALWFWDSMLKARLGGWRM 1944-2022: Missing. | ||||||
| Isoform M6-kinase 1 (identifier: Q9BX84-5) The sequence of this isoform differs from the canonical sequence as follows: 547-1595: Missing. | ||||||
| Note: Lacks the ion channel region. | ||||||
| Isoform M6-kinase 2 (identifier: Q9BX84-6) The sequence of this isoform differs from the canonical sequence as follows: 500-1666: Missing. | ||||||
| Note: Lacks the ion channel region. | ||||||
| Isoform M6-kinase 3 (identifier: Q9BX84-7) The sequence of this isoform differs from the canonical sequence as follows: 281-281: R → P 282-1734: Missing. | ||||||
| Note: Lacks the ion channel region. |
Sequence annotation (Features)
| Feature key | Position(s) | Length | Description | Graphical view | Feature identifier | ||||
Molecule processing | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Chain | 1 – 2022 | 2022 | Transient receptor potential cation channel subfamily M member 6 | PRO_0000215329 | |||||
Regions | |||||||||
| Topological domain | 1 – 741 | 741 | Cytoplasmic Potential | ||||||
| Transmembrane | 742 – 762 | 21 | Helical; Potential | ||||||
| Topological domain | 763 – 841 | 79 | Extracellular Potential | ||||||
| Transmembrane | 842 – 862 | 21 | Helical; Potential | ||||||
| Topological domain | 863 – 905 | 43 | Cytoplasmic Potential | ||||||
| Transmembrane | 906 – 926 | 21 | Helical; Potential | ||||||
| Topological domain | 927 – 939 | 13 | Extracellular Potential | ||||||
| Transmembrane | 940 – 960 | 21 | Helical; Potential | ||||||
| Topological domain | 961 – 972 | 12 | Cytoplasmic Potential | ||||||
| Transmembrane | 973 – 993 | 21 | Helical; Potential | ||||||
| Topological domain | 994 – 1012 | 19 | Extracellular Potential | ||||||
| Intramembrane | 1013 – 1033 | 21 | Pore-forming; Potential | ||||||
| Topological domain | 1034 – 1047 | 14 | Extracellular Potential | ||||||
| Transmembrane | 1048 – 1068 | 21 | Helical; Potential | ||||||
| Topological domain | 1069 – 2022 | 954 | Cytoplasmic Potential | ||||||
| Domain | 1750 – 1980 | 231 | Alpha-type protein kinase | ||||||
| Nucleotide binding | 1950 – 1956 | 7 | ATP By similarity | ||||||
Sites | |||||||||
| Active site | 1923 | 1 | Proton acceptor By similarity | ||||||
| Metal binding | 1909 | 1 | Zinc By similarity | ||||||
| Metal binding | 1966 | 1 | Zinc By similarity | ||||||
| Metal binding | 1968 | 1 | Zinc By similarity | ||||||
| Metal binding | 1972 | 1 | Zinc By similarity | ||||||
| Binding site | 1780 | 1 | ATP By similarity | ||||||
| Binding site | 1804 | 1 | ATP By similarity | ||||||
| Binding site | 1876 | 1 | ATP By similarity | ||||||
| Binding site | 1925 | 1 | ATP By similarity | ||||||
| Binding site | 1933 | 1 | ATP By similarity | ||||||
Amino acid modifications | |||||||||
| Modified residue | 1851 | 1 | Phosphothreonine; by autocatalysis Ref.5 | ||||||
Natural variations | |||||||||
| Alternative sequence | 1 – 11 | 11 | MKEQPVLERLQ → MIILSK in isoform TRPM6b. | VSP_012069 | |||||
| Alternative sequence | 1 – 11 | 11 | MKEQPVLERLQ → MTAPVT in isoform TRPM6c. | VSP_012070 | |||||
| Alternative sequence | 281 | 1 | R → P in isoform M6-kinase 3. | VSP_012071 | |||||
| Alternative sequence | 282 – 1734 | 1453 | Missing in isoform M6-kinase 3. | VSP_012072 | |||||
| Alternative sequence | 500 – 1666 | 1167 | Missing in isoform M6-kinase 2. | VSP_012073 | |||||
| Alternative sequence | 547 – 1595 | 1049 | Missing in isoform M6-kinase 1. | VSP_012074 | |||||
| Alternative sequence | 1926 – 1943 | 18 | GVGEN…PEVKQ → ALWFWDSMLKARLGGWRM in isoform TRPM6t. | VSP_012075 | |||||
| Alternative sequence | 1944 – 2022 | 79 | Missing in isoform TRPM6t. | VSP_012076 | |||||
| Natural variant | 75 | 1 | G → V in a lung adenocarcinoma sample; somatic mutation. Ref.6 | VAR_042387 | |||||
| Natural variant | 141 | 1 | S → L in HOMG1; impairs heterodimer formation resulting in intracellular retention. Ref.2 Ref.3 | VAR_019963 | |||||
| Natural variant | 338 | 1 | M → I. Ref.6 Corresponds to variant rs56155062 [ dbSNP | Ensembl ]. | VAR_042388 | |||||
| Natural variant | 948 | 1 | F → L. Corresponds to variant rs13290391 [ dbSNP | Ensembl ]. | VAR_052380 | |||||
| Natural variant | 1007 | 1 | W → C in a lung large cell carcinoma sample; somatic mutation. Ref.6 | VAR_042389 | |||||
| Natural variant | 1071 | 1 | N → D. Corresponds to variant rs2274922 [ dbSNP | Ensembl ]. | VAR_019964 | |||||
| Natural variant | 1243 | 1 | H → R. Ref.6 Corresponds to variant rs55694430 [ dbSNP | Ensembl ]. | VAR_042390 | |||||
| Natural variant | 1274 | 1 | Q → R. Ref.6 Corresponds to variant rs34608911 [ dbSNP | Ensembl ]. | VAR_042391 | |||||
| Natural variant | 1393 | 1 | V → I. Ref.6 Corresponds to variant rs3750425 [ dbSNP | Ensembl ]. | VAR_019965 | |||||
| Natural variant | 1584 | 1 | K → E. Ref.6 Corresponds to variant rs2274924 [ dbSNP | Ensembl ]. | VAR_019966 | |||||
| Natural variant | 1663 | 1 | Q → R. Ref.6 Corresponds to variant rs55679040 [ dbSNP | Ensembl ]. | VAR_042392 | |||||
| Natural variant | 1673 | 1 | L → S. Ref.6 Corresponds to variant rs56254742 [ dbSNP | Ensembl ]. | VAR_042393 | |||||
| Natural variant | 1724 | 1 | T → I. Ref.6 Corresponds to variant rs56290308 [ dbSNP | Ensembl ]. | VAR_042394 | |||||
Experimental info | |||||||||
| Mutagenesis | 1804 | 1 | K → R: Abolishes kinase activity but does not affect expression levels or binding to GNB2L1. Ref.5 | ||||||
| Mutagenesis | 1851 | 1 | T → A: Significantly decreases autophosphorylation. Does not alter binding to GNB2L1 but prevents inhibition by GNB2L1. Ref.5 | ||||||
| Mutagenesis | 1851 | 1 | T → D: Significantly decreases autophosphorylation. Does not alter binding to GNB2L1 or inhibition by GNB2L1. Ref.5 | ||||||
Sequences
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References
| « Hide 'large scale' references | |
| [1] | "Novel type of signaling molecules: protein kinases covalently linked to ion channels." Riazanova L.V., Pavur K.S., Petrov A.N., Dorovkov M.V., Riazanov A.G. Mol. Biol. (Mosk.) 35:321-332(2001) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM TRPM6A), CHARACTERIZATION. Tissue: Kidney. |
| [2] | "Hypomagnesemia with secondary hypocalcemia is caused by mutations in TRPM6, a new member of the TRPM gene family." Schlingmann K.P., Weber S., Peters M., Niemann Nejsum L.N., Vitzthum H., Klingel K., Kratz M., Haddad E., Ristoff E., Dinour D., Syrrou M., Nielsen S., Sassen M.C., Waldegger S., Seyberth H.W., Konrad M. Nat. Genet. 31:166-170(2002) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM TRPM6A), VARIANT HOMG1 LEU-141. Tissue: Kidney and Small intestine. |
| [3] | "Disruption of TRPM6/TRPM7 complex formation by a mutation in the TRPM6 gene causes hypomagnesemia with secondary hypocalcemia." Chubanov V., Waldegger S., Mederos y Schnitzler M., Vitzthum H., Sassen M.C., Seyberth H.W., Konrad M., Gudermann T. Proc. Natl. Acad. Sci. U.S.A. 101:2894-2899(2004) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORMS TRPM6A; TRPM6B; TRPM6C; TRPM6T; M6-KINASE 1; M6-KINASE 2 AND M6-KINASE 3), CHARACTERIZATION OF VARIANT HOMG1 LEU-141, INTERACTION WITH TRPM7. Tissue: Lung cancer. |
| [4] | "DNA sequence and analysis of human chromosome 9." Humphray S.J., Oliver K., Hunt A.R., Plumb R.W., Loveland J.E., Howe K.L., Andrews T.D., Searle S., Hunt S.E., Scott C.E., Jones M.C., Ainscough R., Almeida J.P., Ambrose K.D., Ashwell R.I.S., Babbage A.K., Babbage S., Bagguley C.L. Dunham I.Nature 429:369-374(2004) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. |
| [5] | "RACK1 inhibits TRPM6 activity via phosphorylation of the fused alpha-kinase domain." Cao G., Thebault S., van der Wijst J., van der Kemp A., Lasonder E., Bindels R.J., Hoenderop J.G. Curr. Biol. 18:168-176(2008) [PubMed] [Europe PMC] [Abstract] Cited for: INTERACTION WITH GNB2L1, PHOSPHORYLATION AT THR-1851, MUTAGENESIS OF LYS-1804 AND THR-1851. |
| [6] | "Patterns of somatic mutation in human cancer genomes." Greenman C., Stephens P., Smith R., Dalgliesh G.L., Hunter C., Bignell G., Davies H., Teague J., Butler A., Stevens C., Edkins S., O'Meara S., Vastrik I., Schmidt E.E., Avis T., Barthorpe S., Bhamra G., Buck G. Stratton M.R.Nature 446:153-158(2007) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANTS [LARGE SCALE ANALYSIS] VAL-75; ILE-338; CYS-1007; ARG-1243; ARG-1274; ILE-1393; GLU-1584; ARG-1663; SER-1673 AND ILE-1724. |
| + | Additional computationally mapped references. |
Cross-references
Sequence databases | |
|---|---|
| EMBL GenBank DDBJ | AF350881 mRNA. Translation: AAK31202.2. AF448232 mRNA. Translation: AAM21562.1. AY333282 mRNA. Translation: AAR03487.1. AY333283 mRNA. Translation: AAR03488.1. AY333284 mRNA. Translation: AAR03489.1. AY333285 mRNA. Translation: AAR03490.1. AY333286 mRNA. Translation: AAR03491.1. AY333287 mRNA. Translation: AAR03492.1. AY333288 mRNA. Translation: AAR03493.1. AL354795 Genomic DNA. Translation: CAH70894.1. |
| IPI | IPI00151366. IPI00438874. IPI00438875. IPI00438890. IPI00472524. IPI00478589. IPI00479402. |
| RefSeq | NP_001170781.1. NM_001177310.1. NP_001170782.1. NM_001177311.1. NP_060132.3. NM_017662.4. |
| UniGene | Hs.272225. |
3D structure databases | |
| ProteinModelPortal | Q9BX84. |
| ModBase | Search... |
Protein-protein interaction databases | |
| MINT | MINT-6699468. |
| STRING | 9606.ENSP00000354006. |
Protein family/group databases | |
| TCDB | 1.A.4.5.8. transient receptor potential Ca2+ channel (TRP-CC) family. |
PTM databases | |
| PhosphoSite | Q9BX84. |
Polymorphism databases | |
| DMDM | 56404951. |
Proteomic databases | |
| PaxDb | Q9BX84. |
| PRIDE | Q9BX84. |
Protocols and materials databases | |
| StructuralBiologyKnowledgebase | Search... |
Genome annotation databases | |
| Ensembl | ENST00000360774; ENSP00000354006; ENSG00000119121. ENST00000361255; ENSP00000354962; ENSG00000119121. ENST00000449912; ENSP00000396672; ENSG00000119121. |
| GeneID | 140803. |
| KEGG | hsa:140803. |
| UCSC | uc004ajk.1. human. uc004ajl.1. human. uc010mpc.1. human. uc010mpd.1. human. uc010mpe.1. human. uc022bib.1. human. |
Organism-specific databases | |
| CTD | 140803. |
| GeneCards | GC09M077337. |
| H-InvDB | HIX0008102. |
| HGNC | HGNC:17995. TRPM6. |
| HPA | HPA007037. |
| MIM | 602014. phenotype. 607009. gene. |
| neXtProt | NX_Q9BX84. |
| Orphanet | 30924. Hypomagnesemia caused by selective magnesium malabsorption. |
| PharmGKB | PA38479. |
| GenAtlas | Search... |
Phylogenomic databases | |
| eggNOG | NOG253824. |
| HOGENOM | HOG000230920. |
| HOVERGEN | HBG055663. |
| KO | K04981. |
| OrthoDB | EOG4SN1MT. |
Gene expression databases | |
| ArrayExpress | Q9BX84. |
| Bgee | Q9BX84. |
| CleanEx | HS_TRPM6. |
| Genevestigator | Q9BX84. |
| GermOnline | ENSG00000119121. Homo sapiens. |
Family and domain databases | |
| InterPro | IPR005821. Ion_trans_dom. IPR011009. Kinase-like_dom. IPR004166. MHCK_EF2_kinase. [Graphical view] |
| Pfam | PF02816. Alpha_kinase. 1 hit. PF00520. Ion_trans. 1 hit. [Graphical view] |
| SMART | SM00811. Alpha_kinase. 1 hit. [Graphical view] |
| SUPFAM | SSF56112. Kinase_like. 1 hit. |
| PROSITE | PS51158. ALPHA_KINASE. 1 hit. [Graphical view] |
| ProtoNet | Search... |
Other | |
| BindingDB | Q9BX84. |
| ChEMBL | CHEMBL1628470. |
| GenomeRNAi | 140803. |
| NextBio | 84406. |
| SOURCE | Search... |
Entry information
| Entry name | TRPM6_HUMAN | ||||||||
| Accession | Primary (citable) accession number: Q9BX84 Secondary accession number(s): Q6VPR8 Q6VPS2 | ||||||||
| Entry history |
| ||||||||
| Entry status | Reviewed (UniProtKB/Swiss-Prot) | ||||||||
| Annotation program | Chordata Protein Annotation Program | ||||||||
| Disclaimer | Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. It is not in any way intended to be used as a substitute for professional medical advice, diagnosis, treatment or care. | ||||||||
Relevant documents
| Human and mouse protein kinases Human and mouse protein kinases: classification and index |
| Human chromosome 9 Human chromosome 9: entries, gene names and cross-references to MIM |
| Human entries with polymorphisms or disease mutations List of human entries with polymorphisms or disease mutations |
| Human polymorphisms and disease mutations Index of human polymorphisms and disease mutations |
| MIM cross-references Online Mendelian Inheritance in Man (MIM) cross-references in UniProtKB/Swiss-Prot |
| SIMILARITY comments Index of protein domains and families |

Clusters with
