Transcription factor, master regulator of tracheal cell fates in the embryo, necessary for the development of the salivary gland duct and the posterior spiracles. It may induce a general fate of branched tubular structures of epithelial origin. Heterodimers of tgo/trh are involved in the control of breathless expression. Drosophila melanogaster (taxid: 7227)
>sp|Q9QZQ0|NPAS3_MOUSE Neuronal PAS domain-containing protein 3 OS=Mus musculus GN=Npas3 PE=2 SV=1
May control regulatory pathways relevant to schizophrenia and to psychotic illness. May play a role in late central nervous system development by modulating EPO expression in response to cellular oxygen level.
Homo sapiens (taxid: 9606)
>sp|P97459|NPAS1_MOUSE Neuronal PAS domain-containing protein 1 OS=Mus musculus GN=Npas1 PE=1 SV=1
May control regulatory pathways relevant to schizophrenia and to psychotic illness. May play a role in late central nervous system development by modulating EPO expression in response to cellular oxygen level.
Score = 53.1 bits (126), Expect = 5e-07, Method: Compositional matrix adjust.
Identities = 36/62 (58%), Positives = 41/62 (66%), Gaps = 6/62 (9%)
Query: 1 MLPLPAAITSQLDKASIIRLTISYLKLRDF--SGHGDPPW---SRDGPSPSKSVKGIPHN 55
+LPLP+AITSQLDKASIIRLT SYLK+R G GD W SR GP S + + H
Sbjct: 26 LLPLPSAITSQLDKASIIRLTTSYLKMRAVFPEGLGD-AWGQPSRTGPLDSVAKELGSHL 84
Query: 56 LQ 57
LQ
Sbjct: 85 LQ 86
Transcription factor that may be a master gene of CNS development in cooperation with Arnt. It may have pleiotropic effects in the tissues expressed during development.
Score = 52.8 bits (125), Expect = 7e-07, Method: Compositional matrix adjust.
Identities = 32/48 (66%), Positives = 35/48 (72%), Gaps = 6/48 (12%)
Query: 1 MLPLPAAITSQLDKASIIRLTISYLKLRDF--SGHGDPPW---SRDGP 43
+LPLP+AITSQLDKASIIRLT SYLK+R G GD W SR GP
Sbjct: 26 LLPLPSAITSQLDKASIIRLTTSYLKMRAVFPEGLGD-AWGQPSRAGP 72
Transcription factor that may be a master gene of CNS development in cooperation with Arnt. It may have pleiotropic effects in the tissues expressed during development.
Homo sapiens (taxid: 9606)
>sp|P05709|SIM_DROME Protein single-minded OS=Drosophila melanogaster GN=sim PE=1 SV=3
Transcription factor that functions as a master developmental regulator controlling midline development of the ventral nerve cord. Required to correctly specify the formation of the central brain complex, which controls walking behavior. Also required for correct patterning of the embryonic genital disk and anal pad anlage.
GO:0006355 "regulation of transcription, DNA-dependent" evidence=ISS
GO:0001077 "RNA polymerase II core promoter proximal region sequence-specific DNA binding transcription factor activity involved in positive regulation of transcription" evidence=IPI
; InterPro: IPR011598 The helix-loop-helix (HLH) DNA-binding domain consists of a closed bundle of four helices in a left-handed twist with two crossover connections. The HLH domain directs dimerisation, and is juxtaposed to basic regions to create a DNA interaction interface surface that recognises specific DNA sequences. Basic region/HLH (bHLH) proteins regulate diverse biological pathways []. bHLH proteins include MyoD [], SREBPs (sterol regulatory element binding proteins) [], and yeast Pho4 (phosphatase system) []. In certain proteins the bHLH domain contains a leucine-zipper motif. The bHLH/leucine zipper (bHLHZip) domain specifies dimerisation within a network of proteins and determines sequence-specific DNA binding []. bHLHZip domains occur in the transcription factors Myc, Mad, Max and Usf [, ]. This entry is bHLHZip, which covers the bHLH domain and the leucine zipper motif, when present.; PDB: 1NLW_A 1NKP_D 1A93_A 2A93_A 1AM9_C 3U5V_A 1A0A_B 2QL2_C 1UKL_C 1AN4_B ....
>cd00083 HLH Helix-loop-helix domain, found in specific DNA- binding proteins that act as transcription factors; 60-100 amino acids long
A DNA-binding basic region is followed by two alpha-helices separated by a variable loop region; HLH forms homo- and heterodimers, dimerization creates a parallel, left-handed, four helix bundle; the basic region N-terminal to the first amphipathic helix mediates high-affinity DNA-binding; there are several groups of HLH proteins: those (E12/E47) which bind specific hexanucleotide sequences such as E-box (5-CANNTG-3) or StRE 5-ATCACCCCAC-3), those lacking the basic domain (Emc, Id) function as negative regulators since they fail to bind DNA, those (hairy, E(spl), deadpan) which repress transcription although they can bind specific hexanucleotide sequences such as N-box (5-CACGc/aG-3), those which have a COE domain (Collier/Olf-1/EBF) which is involved in both in dimerization and in DNA binding, and those which bind pentanucleotides ACGTG or GCGTG and