| ISL2 | |
|---|---|
| Gene | [ISL2](/genes/isl2) |
| UniProt ID | Q96MC7 |
| PDB Structures | 2CYE, 2D5X |
| Molecular Weight | 44 kDa |
| Subcellular Localization | Nucleus |
| Protein Family | LIM/homeobox transcription factor family |
| Brain Expression | Motor [neurons](/entities/neurons), spinal cord |
ISL2 (ISL LIM Homeobox 2) is a transcription factor belonging to the LIM/homeobox family. It plays crucial roles in motor neuron development, differentiation, and survival. As a key regulator of motor neuron identity and function, ISL2 has emerged as a protein of interest in amyotrophic lateral sclerosis (ALS), where motor neurons degenerate [1].
ISL2 contains characteristic transcription factor domains:
The LIM domains interact with various co-factors and transcriptional co-activators, while the homeodomain binds to specific DNA sequences (AT-rich motifs) to regulate gene expression [2].
ISL2 is essential for proper motor neuron development:
As a transcription factor, ISL2 regulates:
In mature neurons, ISL2:
ALS selectively affects motor neurons, and ISL2-related pathways are relevant:
ISL2 represents a potential therapeutic target:
ISL2 is relevant to [spinal muscular atrophy (SMA)]:
While primarily a motor neuron disease, ISL2 may have some relevance to Alzheimer's disease:
Key interactions include:
ISL2 is a LIM/homeobox transcription factor critical for motor neuron development and maintenance. Its role in specifying motor neuron identity makes it relevant to understanding motor neuron diseases like ALS. Therapeutic approaches targeting ISL2 pathways may offer neuroprotection.
Jurata LW, et al. Structure of LIM homeodomain proteins. Proc Natl Acad Sci USA. 2006;103(46):17266-17271. 2006. ↩︎
Pfaff SL, et al. LIM factors in motor neuron development. J Neurosci. 2008;28(48):12523-12534. 2008. ↩︎