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Elba3 | Early boundary activity protein 3; The heterotrimeric Elba complex is required for chromatin domain boundary function during early embryogenesis. It binds to a 8-bp sequence 5'-CCAATAAG-3' in the Fab-7 insulator or boundary element in the bithorax complex and contributes to its insulator or boundary activity. Elba3 lacks DNA-binding activity and plays the role of an adapter protein, bringing Elba1 and 2 together, thereby establishing a complex that recognizes the asymmetric sequence motif through the BEN domains of Elba1 and 2. (379 aa) | ||||
snRNP-U1-C | U1 small nuclear ribonucleoprotein C; Component of the spliceosomal U1 snRNP, which is essential for recognition of the pre-mRNA 5' splice-site and the subsequent assembly of the spliceosome. U1-C is directly involved in initial 5' splice-site recognition for both constitutive and regulated alternative splicing. The interaction with the 5' splice-site seems to precede base-pairing between the pre-mRNA and the U1 snRNA. Stimulates commitment or early (E) complex formation by stabilizing the base pairing of the 5' end of the U1 snRNA and the 5' splice-site region (By similarity). Regulat [...] (145 aa) |