RGD Reference Report - Molecular cloning of multiple splicing variants of JIP-1 preferentially expressed in brain. - Rat Genome Database

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Molecular cloning of multiple splicing variants of JIP-1 preferentially expressed in brain.

Authors: Kim, IJ  Lee, KW  Park, BY  Lee, JK  Park, J  Choi, IY  Eom, SJ  Chang, TS  Kim, MJ  Yeom, YI  Chang, SK  Lee, YD  Choi, EJ  Han, PL 
Citation: Kim IJ, etal., J Neurochem 1999 Apr;72(4):1335-43.
RGD ID: 70789
Pubmed: PMID:10098834   (View Abstract at PubMed)

Stress-activated protein kinase/c-Jun N-terminal kinase (SAPK/JNK) is activated by a variety of cellular or environmental stresses. Proper regulation of the SAPK/JNK pathway may be critical for cell survival or death under various conditions. In this study, we report the molecular cloning of novel isoforms of JIP-1, which harbor a putative phosphotyrosine interaction domain and a helix-loop-helix domain, as well as an SH3 homologous region in the C terminus. Northern analysis indicates that transcription variant jip-1 is expressed in brain and kidney and transcription variants jip-2 and jip-3 are specifically expressed in brain. In situ hybridization data showed that the hybridized jip messages were heavily concentrated in adult brain, and were particularly enriched in the cerebral cortex and hippocampus, the brain regions vulnerable to pathological states such as hypoxia-ischemia, epilepsy, and Alzheimer's disease. All the deduced protein products of the jip transcription variants appear to have a similar property in that they inhibit the SAPK/JNK stimulation when overexpressed. Inhibition of SAPK activation by overexpression of the novel isoform JIP-2a resulted in suppression of etoposide-induced cell death in a neuroglioma cell line, N18TG. These findings suggest that JIP may play an important role in regulation of the SAPK pathway that is involved in stress-induced cellular responses.



Gene Ontology Annotations    Click to see Annotation Detail View

Biological Process

  
Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
Mapk8ip1Ratnegative regulation of apoptotic process  IDA  RGD 

Objects Annotated

Genes (Rattus norvegicus)
Mapk8ip1  (mitogen-activated protein kinase 8 interacting protein 1)

Objects referenced in this article
Gene Mapk8ip1 mitogen-activated protein kinase 8 interacting protein 1 Mus musculus

Additional Information