background:
GARNL1 is expressed during embryogenesis with E12. During development, GARNL1 expression decreases, persisting at high levels only in neurons of the adult brain. GARNL1 localizes to the cytoplasm where it may play a role regulating GTP hydrolysis of proteins such as Ran and Rap. GARNL1 is imported to the nucleus via dimerization with E12. GARNL1 interacts with the HLH region of E12 and may function to negatively regulate the transcription of E12-dependent downstream target genes. This suggests that at least a portion of the function of GARNL1 is dependent upon its association with E12. GARNL1 may also associate with other HLH proteins and influence a variety of HLH signaling cascades. In adult brain, GARNL1 activity does not involve E12 and therefore it may serve a different function in developed neural tissue.
Function:
GTPase activating Rap/RanGAP domain-like 1 (GARNL1) is an interacting partner of the transcription factor TCF3/isoform E12, mainly in the developing embryonic forebrain. It may be an important transcriptional regulator of downstream target genes under the control of TCF3/E12, by disrupting HLH dimer formation of TCF3/E12 with other proteins and may be involved in neuronal differentiation.
Subunit:
Component of the heterodimeric RalGAP1 complex with RALGAPB. Heterodimerization is required for activity. Interacts with the HLH region of TCF3/isoform E12 (By similarity).
Subcellular Location:
Cytoplasmic and Nuclear. Translocated to the nucleus when associated with TCF3/E12.
Tissue Specificity:
Widely expressed.
Similarity:
Contains 1 Rap-GAP domain.
Database links:
UniProtKB/Swiss-Prot: Q6GYQ0.1
Important Note:
This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications.
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