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KCNJ1 potassium inwardly rectifying channel subfamily J member 1 [ Homo sapiens (human) ]

Gene ID: 3758, updated on 5-Mar-2024

Summary

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Official Symbol
KCNJ1provided by HGNC
Official Full Name
potassium inwardly rectifying channel subfamily J member 1provided by HGNC
Primary source
HGNC:HGNC:6255
See related
Ensembl:ENSG00000151704 MIM:600359; AllianceGenome:HGNC:6255
Gene type
protein coding
RefSeq status
REVIEWED
Organism
Homo sapiens
Lineage
Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo
Also known as
ROMK; ROMK1; KIR1.1
Summary
Potassium channels are present in most mammalian cells, where they participate in a wide range of physiologic responses. The protein encoded by this gene is an integral membrane protein and inward-rectifier type potassium channel. It is activated by internal ATP and probably plays an important role in potassium homeostasis. The encoded protein has a greater tendency to allow potassium to flow into a cell rather than out of a cell. Mutations in this gene have been associated with antenatal Bartter syndrome, which is characterized by salt wasting, hypokalemic alkalosis, hypercalciuria, and low blood pressure. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]
Expression
Restricted expression toward kidney (RPKM 75.2) See more
Orthologs
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Genomic context

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See KCNJ1 in Genome Data Viewer
Location:
11q24.3
Exon count:
5
Annotation release Status Assembly Chr Location
RS_2023_10 current GRCh38.p14 (GCF_000001405.40) 11 NC_000011.10 (128838020..128867296, complement)
RS_2023_10 current T2T-CHM13v2.0 (GCF_009914755.1) 11 NC_060935.1 (128870511..128899787, complement)
105.20220307 previous assembly GRCh37.p13 (GCF_000001405.25) 11 NC_000011.9 (128707915..128737191, complement)

Chromosome 11 - NC_000011.10Genomic Context describing neighboring genes Neighboring gene uncharacterized LOC101929538 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 5731 Neighboring gene ATAC-STARR-seq lymphoblastoid silent region 4056 Neighboring gene ATAC-STARR-seq lymphoblastoid silent region 4057 Neighboring gene ATAC-STARR-seq lymphoblastoid silent region 4058 Neighboring gene CRISPRi-FlowFISH-validated ETS1 regulatory element GRCh37_chr11:128563455-128564187 Neighboring gene ATAC-STARR-seq lymphoblastoid silent region 4060 Neighboring gene ATAC-STARR-seq lymphoblastoid silent region 4061 Neighboring gene ATAC-STARR-seq lymphoblastoid silent region 4062 Neighboring gene CDK7 strongly-dependent group 2 enhancer GRCh37_chr11:128570339-128571538 Neighboring gene ATAC-STARR-seq lymphoblastoid silent region 4063 Neighboring gene Fli-1 proto-oncogene, ETS transcription factor Neighboring gene NANOG hESC enhancer GRCh37_chr11:128585502-128586027 Neighboring gene smooth muscle and endothelial cell enriched migration/differentiation-associated lncRNA Neighboring gene ATAC-STARR-seq lymphoblastoid active region 5733 Neighboring gene NANOG-H3K27ac hESC enhancer GRCh37_chr11:128587835-128588354 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 5734 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 5735 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 5736 Neighboring gene H3K4me1 hESC enhancer GRCh37_chr11:128596161-128596660 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 5737 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 5738 Neighboring gene OCT4-NANOG-H3K27ac-H3K4me1 hESC enhancer GRCh37_chr11:128603944-128604489 Neighboring gene ATAC-STARR-seq lymphoblastoid silent region 4064 Neighboring gene H3K4me1 hESC enhancer GRCh37_chr11:128627636-128628136 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 5740 Neighboring gene H3K4me1 hESC enhancer GRCh37_chr11:128628137-128628637 Neighboring gene H3K4me1 hESC enhancer GRCh37_chr11:128646623-128647228 Neighboring gene OCT4-NANOG hESC enhancer GRCh37_chr11:128654003-128654550 Neighboring gene OCT4-NANOG hESC enhancer GRCh37_chr11:128654551-128655097 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 5741 Neighboring gene H3K27ac-H3K4me1 hESC enhancer GRCh37_chr11:128689257-128689763 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 5742 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 5743 Neighboring gene uncharacterized LOC107984409 Neighboring gene Sharpr-MPRA regulatory region 11395 Neighboring gene NANOG-H3K27ac-H3K4me1 hESC enhancer GRCh37_chr11:128740730-128741492 Neighboring gene NANOG hESC enhancer GRCh37_chr11:128741942-128742537 Neighboring gene NANOG-H3K4me1 hESC enhancer GRCh37_chr11:128771525-128772283 Neighboring gene ATAC-STARR-seq lymphoblastoid silent region 4065 Neighboring gene KCNJ5 antisense RNA 1 Neighboring gene potassium inwardly rectifying channel subfamily J member 5 Neighboring gene H3K27ac-H3K4me1 hESC enhancer GRCh37_chr11:128796283-128797283 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 5745 Neighboring gene ATAC-STARR-seq lymphoblastoid active region 5746 Neighboring gene H3K4me1 hESC enhancer GRCh37_chr11:128808070-128808570 Neighboring gene H3K4me1 hESC enhancer GRCh37_chr11:128808571-128809071 Neighboring gene H3K4me1 hESC enhancer GRCh37_chr11:128810609-128811109 Neighboring gene tumor protein p53 regulated apoptosis inducing protein 1

Genomic regions, transcripts, and products

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Go to nucleotide: Graphics FASTA GenBank

Expression

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  • Project title: HPA RNA-seq normal tissues
  • Description: RNA-seq was performed of tissue samples from 95 human individuals representing 27 different tissues in order to determine tissue-specificity of all protein-coding genes
  • BioProject: PRJEB4337
  • Publication: PMID 24309898
  • Analysis date: Wed Apr 4 07:08:55 2018

Bibliography

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Related articles in PubMed

  1. Solubilization, purification, and functional reconstitution of human ROMK potassium channel in copolymer styrene-maleic acid (SMA) nanodiscs. Krajewska M, et al. Biochim Biophys Acta Biomembr, 2021 Apr 1. PMID 33444624
  2. Eight novel KCNJ1 variants and parathyroid hormone overaction or resistance in 5 probands with Bartter syndrome type 2. Zuo J, et al. Clin Chim Acta, 2020 Dec. PMID 33058840
  3. Single-Channel Properties of the ROMK-Pore-Forming Subunit of the Mitochondrial ATP-Sensitive Potassium Channel. Laskowski M, et al. Int J Mol Sci, 2019 Oct 25. PMID 31731540, Free PMC Article
  4. Evidence for a mitochondrial ATP-regulated potassium channel in human dermal fibroblasts. Bednarczyk P, et al. Biochim Biophys Acta Bioenerg, 2018 May. PMID 29458000
  5. The endosomal trafficking factors CORVET and ESCRT suppress plasma membrane residence of the renal outer medullary potassium channel (ROMK). Mackie TD, et al. J Biol Chem, 2018 Mar 2. PMID 29311259, Free PMC Article

See all (60) citations in PubMed

GeneRIFs: Gene References Into Functions

What's a GeneRIF?
  1. Association of polymorphisms of calcium reabsorption genes SLC12A1, KCNJ1 and SLC8A1 with colorectal adenoma.
    Title: Association of polymorphisms of calcium reabsorption genes SLC12A1, KCNJ1 and SLC8A1 with colorectal adenoma.
  2. Eight novel KCNJ1 variants and parathyroid hormone overaction or resistance in 5 probands with Bartter syndrome type 2.
    Title: Eight novel KCNJ1 variants and parathyroid hormone overaction or resistance in 5 probands with Bartter syndrome type 2.
  3. Solubilization, purification, and functional reconstitution of human ROMK potassium channel in copolymer styrene-maleic acid (SMA) nanodiscs.
    Title: Solubilization, purification, and functional reconstitution of human ROMK potassium channel in copolymer styrene-maleic acid (SMA) nanodiscs.
  4. Single-Channel Properties of the ROMK-Pore-Forming Subunit of the Mitochondrial ATP-Sensitive Potassium Channel.
    Title: Single-Channel Properties of the ROMK-Pore-Forming Subunit of the Mitochondrial ATP-Sensitive Potassium Channel.
  5. endosomal trafficking factors CORVET and ESCRT suppress plasma membrane residence of the renal outer medullary potassium channel
    Title: The endosomal trafficking factors CORVET and ESCRT suppress plasma membrane residence of the renal outer medullary potassium channel (ROMK).
  6. We replicated the methods in a previous study to detect rare and potentially loss-of-function variants in SLC12A3, SLC12A1, and KCNJ1 reducing blood pressure in variant carriers as compared with noncarriers using whole exome sequencing data. Our study confirmed that SLC12A3, SLC12A1, and KCNJ1 are indeed genes protective of hypertension in the general population.
    Title: Contributions of rare coding variants in hypotension syndrome genes to population blood pressure variation.
  7. The presence of ROMK protein was observed in the inner mitochondrial membrane fraction. Moreover, colocalization of the ROMK protein and a mitochondrial marker in the mitochondria of fibroblast cells was shown by immunofluorescence.
    Title: Evidence for a mitochondrial ATP-regulated potassium channel in human dermal fibroblasts.
  8. Data suggest underlying pathology for some patients with type II Bartter syndrome is linked to stability of ROMK1 in ERAD pathway; using a yeast expression system, cells can be rescued by wild-type (rat) ROMK1 but not by ROMK1 containing any one of four mutations found in (human) type II Bartter syndrome; mutant ROMKs are significantly less stable than wild-type ROMK. (ERAD = endoplasmic reticulum-associated degradation)
    Title: Endoplasmic reticulum-associated degradation of the renal potassium channel, ROMK, leads to type II Bartter syndrome.
  9. WNK4 is a substrate of SFKs and the association of c-Src and PTP-1D with WNK4 at Tyr(1092) and Tyr(1143) plays an important role in modulating the inhibitory effect of WNK4 on ROMK
    Title: Src-family protein tyrosine kinase phosphorylates WNK4 and modulates its inhibitory effect on KCNJ1 (ROMK).
  10. knockdown of KCNJ1 in HK-2 cells promoted cell proliferation. Collectively, these data highlight that KCNJ1, low-expressed in ccRCC and associated with poor prognosis, plays an important role in ccRCC cell growth and metastasis
    Title: KCNJ1 inhibits tumor proliferation and metastasis and is a prognostic factor in clear cell renal cell carcinoma.
Submit: New GeneRIF Correction See all GeneRIFs (41)

Phenotypes

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Find tests for this gene in the NIH Genetic Testing Registry (GTR)

Review eQTL and phenotype association data in this region using PheGenI

Associated conditions

Description Tests
Bartter disease type 2
MedGen: C1855849 OMIM: 241200 GeneReviews: Not available
Compare labs

Variation

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See variants in ClinVar

See studies and variants in dbVar

See Variation Viewer (GRCh37.p13)

See Variation Viewer (GRCh38)

Genotypes

Pathways from PubChem

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Interactions

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Products Interactant Other Gene Complex Source Pubs Description

General gene information

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Markers

Homology

Gene Ontology Provided by GOA

Function Evidence Code Pubs
enables ATP binding ISS
Inferred from Sequence or Structural Similarity
more info
  
enables ATP-activated inward rectifier potassium channel activity IBA
Inferred from Biological aspect of Ancestor
more info
  
enables inward rectifier potassium channel activity ISS
Inferred from Sequence or Structural Similarity
more info
  
enables phosphatidylinositol-4,5-bisphosphate binding IDA
Inferred from Direct Assay
more info
 PubMed 
Process Evidence Code Pubs
involved_in potassium ion import across plasma membrane IBA
Inferred from Biological aspect of Ancestor
more info
  
involved_in potassium ion import across plasma membrane ISS
Inferred from Sequence or Structural Similarity
more info
  
involved_in regulation of monoatomic ion transmembrane transport IBA
Inferred from Biological aspect of Ancestor
more info
  
Component Evidence Code Pubs
part_of monoatomic ion channel complex IEA
Inferred from Electronic Annotation
more info
  
is_active_in plasma membrane IBA
Inferred from Biological aspect of Ancestor
more info
  
located_in plasma membrane TAS
Traceable Author Statement
more info
  

General protein information

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Preferred Names
ATP-sensitive inward rectifier potassium channel 1
Names
ATP-regulated potassium channel ROM-K
inward rectifier K(+) channel Kir1.1
inwardly rectifying K+ channel
potassium channel, inwardly rectifying subfamily J member 1
potassium voltage-gated channel subfamily J member 1

NCBI Reference Sequences (RefSeq)

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RefSeqs maintained independently of Annotated Genomes

These reference sequences exist independently of genome builds. Explain

These reference sequences are curated independently of the genome annotation cycle, so their versions may not match the RefSeq versions in the current genome build. Identify version mismatches by comparing the version of the RefSeq in this section to the one reported in Genomic regions, transcripts, and products above.

Genomic

  1. NG_009379.1 RefSeqGene

    Range
    5078..34354
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

mRNA and Protein(s)

  1. NM_000220.6 → NP_000211.1  ATP-sensitive inward rectifier potassium channel 1 isoform a

    See identical proteins and their annotated locations for NP_000211.1

    Status: REVIEWED

    Description
    Transcript Variant: This variant (1, also known as rom-k1) encodes the longest isoform (a).
    Source sequence(s)
    AK290797, AW611934, BC063109
    Consensus CDS
    CCDS8476.1
    UniProtKB/Swiss-Prot
    B2RMR4, P48048, Q6LD67
    UniProtKB/TrEMBL
    A8K432
    Related
    ENSP00000376432.2, ENST00000392664.2
    Conserved Domains (1) summary
    pfam01007
    Location:43 → 371
    IRK; Inward rectifier potassium channel

  2. NM_153764.3 → NP_722448.1  ATP-sensitive inward rectifier potassium channel 1 isoform b

    See identical proteins and their annotated locations for NP_722448.1

    Status: REVIEWED

    Description
    Transcript Variant: This variant (2, also known as rom-k2) differs in the 5' UTR and coding region compared to variant 1. The resulting isoform (b) is shorter at the N-terminus than isoform a. Variants 2, 4 and 5 all encode isoform b but differ in their 5' UTRs.
    Source sequence(s)
    AW611934, BC063109, U03884, U12542
    Consensus CDS
    CCDS8477.1
    UniProtKB/TrEMBL
    A8K432
    Related
    ENSP00000376433.2, ENST00000392665.6
    Conserved Domains (1) summary
    pfam01007
    Location:24 → 352
    IRK; Inward rectifier potassium channel

  3. NM_153765.3 → NP_722449.3  ATP-sensitive inward rectifier potassium channel 1 isoform c

    See identical proteins and their annotated locations for NP_722449.3

    Status: REVIEWED

    Description
    Transcript Variant: This variant (3, also known as rom-k3) differs in the 5' UTR and coding region compared to variant 1. The resulting isoform (c) is shorter and has a different N-terminus compared to isoform a.
    Source sequence(s)
    AW611934, U03884, U12542
    UniProtKB/TrEMBL
    A8K432
    Conserved Domains (1) summary
    pfam01007
    Location:41 → 369
    IRK; Inward rectifier potassium channel

  4. NM_153766.3 → NP_722450.1  ATP-sensitive inward rectifier potassium channel 1 isoform b

    See identical proteins and their annotated locations for NP_722450.1

    Status: REVIEWED

    Description
    Transcript Variant: This variant (4, also known as rom-k4) differs in the 5' UTR and coding region compared to variant 1. The resulting isoform (b) is shorter at the N-terminus than isoform a. Variants 2, 4 and 5 all encode isoform b but differ in their 5' UTRs.
    Source sequence(s)
    AW611934, BC063109, U03884, U12542
    Consensus CDS
    CCDS8477.1
    UniProtKB/TrEMBL
    A8K432
    Related
    ENSP00000376434.1, ENST00000392666.6
    Conserved Domains (1) summary
    pfam01007
    Location:24 → 352
    IRK; Inward rectifier potassium channel

  5. NM_153767.4 → NP_722451.1  ATP-sensitive inward rectifier potassium channel 1 isoform b

    See identical proteins and their annotated locations for NP_722451.1

    Status: REVIEWED

    Description
    Transcript Variant: This variant (5, also known as rom-k5) differs in the 5' UTR and coding region compared to variant 1. The resulting isoform (b) is shorter at the N-terminus than isoform a. Variants 2, 4 and 5 all encode isoform b but differ in their 5' UTRs.
    Source sequence(s)
    AW611934, BC063109, U03884, U12542
    Consensus CDS
    CCDS8477.1
    UniProtKB/TrEMBL
    A8K432
    Related
    ENSP00000316233.3, ENST00000324036.7
    Conserved Domains (1) summary
    pfam01007
    Location:24 → 352
    IRK; Inward rectifier potassium channel

RefSeqs of Annotated Genomes: GCF_000001405.40-RS_2023_10

The following sections contain reference sequences that belong to a specific genome build. Explain

Reference GRCh38.p14 Primary Assembly

Genomic

  1. NC_000011.10 Reference GRCh38.p14 Primary Assembly

    Range
    128838020..128867296 complement
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)

Alternate T2T-CHM13v2.0

Genomic

  1. NC_060935.1 Alternate T2T-CHM13v2.0

    Range
    128870511..128899787 complement
    Download
    GenBank, FASTA, Sequence Viewer (Graphics)
Nucleotide Protein
Heading Accession and Version
Protein Accession Links
GenPept Link UniProtKB Link
P48048.1 GenPept UniProtKB/Swiss-Prot:P48048

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