Conserved Protein Domain Family
bHLHzip_Mnt

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cd11402: bHLHzip_Mnt 
basic Helix-Loop-Helix-zipper (bHLHzip) domain found in Max-binding protein Mnt and similar proteins
Mnt, also termed Class D basic helix-loop-helix protein 3 (bHLHd3), or Myc antagonist MNT, or protein ROX, is a bHLHZip transcriptional repressor that binds DNA as a heterodimer with MAX. It binds to the canonical E box sequence 5'-CACGTG-3' and, with higher affinity, to 5'-CACGCG-3'. Mnt has an important role as an antagonist and regulator of Myc activities and it is a potential tumor suppressor. Mnt is ubiquitously expressed. Mnt-deficient mice shown to exhibit early postnatal lethality.
Statistics
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PSSM-Id: 381408
Aligned: 21 rows
Threshold Bit Score: 121.273
Created: 12-Jul-2011
Updated: 2-Oct-2020
Structure
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Aligned Rows:
 
Feature 1:putative DNA binding site [nucleic acid binding site]
Evidence:
  • Comment:The N-terminal basic region of bHLHzip mediates high-affinity DNA-binding to specific hexanucleotide sequences
  • Comment:Based on the structure evidence that Homo sapiens Mad transcription factor (1NLW) basic region binds the DNA.

Sequence Alignment
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Format: Row Display: Color Bits: Type Selection:
Feature 1              ##  ## ##   #                   ###                                       
Q99583        220 GTREVHNKLEKNRRAHLKECFETLKRNIPn--vDDKKTSNLSVLRTALRYIQSLKRKEKEYEHEMERLAREKIATQQRL 296  human
EKC22551       66 GTREVHNKLEKNRRAHLKECFDILKKQIPt--lEDKRTSNLCILRGSIRYIQAVKRKEKEYELEMQRLAKEKITLQERI 142  Pacific oyster
PIK62960      188 GVREVHNKLEKNRRAHLKECFDALKSQIPtlqdRKVKISNSNILSGACRYIGALKRKEKELEHELDRLVKEKIQKQKLL 266  Japanese sea c...
ELT90463       68 SLREVHNKLEKNRRAHLKECFDNLWNQIPh--gDLGKTSNLNILRCALRFIQLIKRQDKELEKELHDLAQAKIASQQRI 144  Capitella teleta
XP_006820749   73 GTREVHNKLEKNRRAHLKECFDVLKKHIPn--mEDKKTSNLCILRSALRYIQILKKKEREYEHNMDYLARQKVALQQKL 149  Saccoglossus k...
XP_001636672   63 GTRETHNKLEKNRRAHLKECFDVLKREVPt--lEDKKTSNLNILRSALKHIQILKKQEREYENEYGQLKLSNRAKRERA 139  starlet sea an...
KJE97779      278 KNRETHNLLEKNRRAHLKDCFTALKDAIPei-aNNPKTSTVAILQHAQNFIVKLQFMTDSVVANINAFQQHNQQAMALL 355  Capsaspora owc...
NP_001162651  455 GTREVHNKLEKERRAQLKECYDLLKKVLPmgdeDRKKTSNLTILDTAHKYVNSLSHEVCEQEAKIEKLAKQKIELQKRL 533  fruit fly
XP_009861486  208 KVTLTHNQLEKIRRAHLKECFEALKSHLPg--lGIRRSSNLTILKAANRHIKIIVKKCRDNLTLKEKLKREIELKQKQL 284  vase tunicate
XP_014215065  216 GTREVHNKLEKNRRAHLKECFDRLKATIPg--mTNRKTSNLNVLKEAVTYTKHLRKQNIDYDRKMTEITRINIELQNKC 292  Copidosoma flo...

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