Score = 116 bits (291), Expect = 3e-26, Method: Compositional matrix adjust.
Identities = 60/104 (57%), Positives = 77/104 (74%), Gaps = 11/104 (10%)
Query: 10 YPEVMKPMLERKRRARINRCLDELKEIMVTSLQAEGENVSKLEKADILELTVRHLHKLRR 69
Y +VMKPMLERKRRARIN+CLDELK+IMV L EGE++++LEKADILELTV H+ KLR
Sbjct: 13 YRKVMKPMLERKRRARINKCLDELKDIMVECLTQEGEHITRLEKADILELTVEHMKKLRA 72
Query: 70 QQSL-------GLTPEA----AYADRFKAGFTHCAAEVSQYLAS 102
Q+ L G++P A + A+ F+AG+ H A EVS+ LA+
Sbjct: 73 QKQLRLSSVTGGVSPSADPKLSIAESFRAGYVHAANEVSKTLAA 116
Transcriptional repressor of genes that require a bHLH protein for their transcription. May serve as a transcriptional regulator of the Achaete-scute complex (AS-C) genes. Contributes to the neural-epidermal lineage decision during early neurogenesis. Part of the Notch signaling pathway. Drosophila melanogaster (taxid: 7227)
>sp|Q01070|ESMC_DROME Enhancer of split mgamma protein OS=Drosophila melanogaster GN=HLHmgamma PE=2 SV=1
Transcriptional repressor of genes that require a bHLH protein for their transcription. May serve as a transcriptional regulator of the Achaete-scute complex (AS-C) genes. Contributes to the neural-epidermal lineage decision during early neurogenesis. Part of the Notch signaling pathway.
Drosophila melanogaster (taxid: 7227)
>sp|Q01068|ESM3_DROME Enhancer of split m3 protein OS=Drosophila melanogaster GN=HLHm3 PE=1 SV=1
Score = 107 bits (268), Expect = 2e-23, Method: Compositional matrix adjust.
Identities = 52/108 (48%), Positives = 75/108 (69%), Gaps = 12/108 (11%)
Query: 10 YPEVMKPMLERKRRARINRCLDELKEIMVTSLQAEGENVSKLEKADILELTVRHLHKLRR 69
Y +VMKP+LERKRRARIN+CLD+LK++MV LQ EGE+V++LEKADILELTV H+ KL++
Sbjct: 11 YRKVMKPLLERKRRARINKCLDDLKDLMVECLQQEGEHVTRLEKADILELTVDHMRKLKQ 70
Query: 70 QQSLGL------------TPEAAYADRFKAGFTHCAAEVSQYLASSMQ 105
+ L L + A+ + F++G+ H A +++Q L + Q
Sbjct: 71 RGGLSLQGVVAGVGSPPTSTSTAHVESFRSGYVHAADQITQVLLQTQQ 118
Transcriptional repressor of genes that require a bHLH protein for their transcription. May serve as a transcriptional regulator of the Achaete-scute complex (AS-C) genes. Belongs to notch signaling pathway and depends on Su(H) for transcriptional activation.
Drosophila melanogaster (taxid: 7227)
>sp|Q01071|ESMD_DROME Enhancer of split mdelta protein OS=Drosophila melanogaster GN=HLHmdelta PE=1 SV=1
Transcriptional repressor of genes that require a bHLH protein for their transcription. May serve as a transcriptional regulator of the Achaete-scute complex (AS-C) genes. Contributes to the neural-epidermal lineage decision during early neurogenesis. Part of the Notch signaling pathway.
Drosophila melanogaster (taxid: 7227)
>sp|Q26263|DPN_DROME Protein deadpan OS=Drosophila melanogaster GN=dpn PE=1 SV=2
Transcriptional repressor of genes that require a bHLH protein for their transcription. Likely to be involved in the functional rather than the morphological differentiation of neurons. Loss of DPN function results in weak motor activity, lethargic behavior, and death. Implicated in sex determination as Groucho-DPN complex act directly to repress SXL transcription.
Drosophila melanogaster (taxid: 7227)
>sp|P13097|ESM7_DROME Enhancer of split m7 protein OS=Drosophila melanogaster GN=HLHm7 PE=2 SV=1
Participates in the control of cell fate choice by uncommitted neuroectodermal cells in the embryo. Transcriptional repressor. Binds DNA on N-box motifs: 5'-CACNAG-3'.
Transcriptional repressor. Binds DNA on N-box motifs: 5'-CACNAG-3'. Plays a role in the patterning of tissue boundaries. Promotes floor plate development and prechordal plate development. Required for lens development as early as the stage of lens field formation, partly through regulation of gene expression of the cell cycle inhibitor cdknx/p27(xic1). A role in neural crest development is disputed.
Transcriptional repressor. Binds DNA on N-box motifs: 5'-CACNAG-3'. Promotes floor plate development and prechordal plate development. Required for lens development as early as the stage of lens field formation, partly through regulation of gene expression of the cell cycle inhibitor cdknx/p27(xic1). Required for formation of the neural crest downstream of multiple signaling pathways, and acts at the neural plate border via both DNA-binding dependent and independent mechanisms. Also acts via repressor-dependent and repressor-independent mechanisms in early gastrulae to establish the prospective anterior prechordal mesoderm identity in the Spemann organizer; induces specific genes independently from direct transcriptional regulation, and represses the genes specific for neighboring tissues through direct transcriptional repression. Modulates lateral inhibition during notch signaling and regulates the cell context dependent effects of notch (which can have inhibitory, permissive or enhancing roles in muscle or neural differentiation). Inhibits myogenesis.
Transcriptional repressor of a subset of early mesodermal genes including myod1 and t/bra. Binds DNA on N-box motifs: 5'-CACNAG-3'. Acts as a negative regulator of myogenesis, mediating Notch signaling to repress expression of myod1.
Xenopus laevis (taxid: 8355)
Close Homologs in the Non-Redundant Database Detected by BLAST
>gi|91089129|ref|XP_972685.1| PREDICTED: similar to AGAP012342-PA [Tribolium castaneum] gi|270012431|gb|EFA08879.1| hypothetical protein TcasGA2_TC006580 [Tribolium castaneum]
>gi|91089123|ref|XP_972493.1| PREDICTED: similar to enhancer of split protein, putative [Tribolium castaneum] gi|270011512|gb|EFA07960.1| hypothetical protein TcasGA2_TC005541 [Tribolium castaneum]
Score = 220 (82.5 bits), Expect = 3.6e-18, P = 3.6e-18
Identities = 49/94 (52%), Positives = 66/94 (70%)
Query: 10 YPEVMKPMLERKRRARINRCLDELKEIMVTSLQAEGENVSKLEKADILELTVRHLHKLRR 69
Y +VMKP+LERKRRARIN+CLDELK++M + G+ +K EKADILE+TV+HL KL+
Sbjct: 13 YRKVMKPLLERKRRARINKCLDELKDLMAECVAQTGD--AKFEKADILEVTVQHLRKLKE 70
Query: 70 QQS-LGLTPEAAYADRFKAGFTHCAAEVSQYLAS 102
+ + PE + F+AG+ A EVS+ LAS
Sbjct: 71 SKKHVPANPEQS----FRAGYIRAANEVSRALAS 100
GO:0001078 "RNA polymerase II core promoter proximal region sequence-specific DNA binding transcription factor activity involved in negative regulation of transcription" evidence=IDA
GO:0000122 "negative regulation of transcription from RNA polymerase II promoter" evidence=IMP;IDA
GO:0043565 "sequence-specific DNA binding" evidence=IDA
>gnl|CDD|238036 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 have a PAS domain which allows the dimerization between PAS proteins, the binding of small molecules (e.g., dioxin), and interactions with non-PAS proteins. Length = 60
The Orange domain is found in the Drosophila proteins Hesr-1, Hairy, and Enhancer of Split. The Orange domain is proposed to mediate specific protein-protein interaction between Hairy and Scute. Length = 42
; 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
HES-2 (hairy and enhancer of split 2) is a transcription factor, and the hairy protein is a pair-rule protein that regulates embryonic segmentation and adult bristle patterning. These proteins are transcriptional repressors of genes that require the BHLH protein for their transcription.; GO: 0003677 DNA binding, 0006355 regulation of transcription, DNA-dependent; PDB: 2DB7_A.
