Gene Information
Gene NameJPH2
OrganismHomo sapiens (Human)
Gene Length696
Protein NamesJunctophilin-2 (JP-2) (Junctophilin type 2) [Cleaved into: Junctophilin-2 N-terminal fragment (JP2NT)]
Target NameNA
Target TypeNA
Gene Age680 ( ENSG00000149596 )
Evolutionary StageEumetazoa
AlphaFoldDBQ9BR39
Gene CardJPH2
Uniprot IDQ9BR39
PfamPF02493
In ASDno
Allosteric Predictionyes (0.52549385)
Ortholog in AnimalsAlpaca_ JPH2 ( ortholog_one2one )
Dog_ JPH2 ( ortholog_one2one )
GuineaPig_ JPH2 ( ortholog_one2one )
Macaque_ JPH2 ( ortholog_one2one )
Mouse_ Jph2 ( ortholog_one2one )
Rat_ Jph2 ( ortholog_one2one )
OhnologsJPH4, JPH1, JPH3
ParalogsJPH3, JPH1, JPH4
Tissueheart, sigmoid.colon
Tissue SpecificitySpecifically expressed in skeletal muscle and heart. {ECO:0000269|PubMed:10891348}.
Pharmacological Animal ModelsNA
Gene Ontology
(biological process)
Gene Ontology
(cellular component)
Gene Ontology
(molecular function)
PDB 7RXE  (X-ray  2.35A  7RXQ  (X-ray  2.03A 
DBSNP rs1600482909  rs387906897  rs587782951  rs387906898  rs3810510  rs557878787  rs199896820  rs1326977511  rs140740776 
Subcellular location [CC][Junctophilin-2]: Cell membrane {ECO:0000250|UniProtKB:Q9ET78};
Peripheral membrane protein {ECO:0000250|UniProtKB:Q9ET78}. Sarcoplasmic reticulum membrane {ECO:0000250|UniProtKB:Q9ET78};
Single-pass type IV membrane protein {ECO:0000250|UniProtKB:Q9ET78}. Endoplasmic reticulum membrane {ECO:0000250|UniProtKB:Q9ET78};
Single-pass type IV membrane protein {ECO:0000250|UniProtKB:Q9ET78}. Note=The transmembrane domain is anchored in sarcoplasmic reticulum membrane, while the N-terminal part associates with the plasma membrane. In heart cells, it predominantly associates along Z lines within myocytes. In skeletal muscle, it is specifically localized at the junction of A and I bands. {ECO:0000250|UniProtKB:Q9ET78}.;
[Junctophilin-2 N-terminal fragment]: Nucleus {ECO:0000269|PubMed:30409805}. Note=Accumulates in the nucleus of stressed hearts. {ECO:0000250|UniProtKB:Q9ET78}.
Mouse PG classificationHPG
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