Part:BBa_K3239004

Mit1 transcription factor in the P.pastoris GS115 strain

Transcription factor in the P. pastoris GS115 strain. Upregulates AOX1 expression and downregulates PRM1 expression.

Usage and Biology

The Mit1 transcription factor is homogeneous to the P. pastoris GS115 strain and is critical in the regulation of AOX1 (alcohol oxidase 1) expression in the methylotrophic yeast. Upon methanol induction, the Mxr1 transcription factor is expressed and the PRM1 promoter (P_PRM1) is activated. Mxr1 derepresses the AOX1 promoter (P_AOX1), whereas the Prm1 protein not only self-upregulates but also upregulates the expression of the MIT1 gene. Prm1 and Mit1 both upregulate AOX1 expression, allowing the yeast to rapidly produce enough alcohol oxidase 1 to metabolize methanol. Mit1 however, also downregulates the expression of PRM1, inhibiting the over-activation of P_PRM1, P_MIT1 and P_AOX1.

Functional Parameters

Published literature has shown that Mit1 activates P_AOX1 more strongly than Prm1.

Reference

Liang, S., Wang, B., Pan, L., Ye, Y., He, M., Han, S., … Lin, Y. (2012). Comprehensive structural annotation of Pichia pastoris transcriptome and the response to various carbon sources using deep paired-end RNA sequencing. BMC Genomics, 13(1). https://doi.org/10.1186/1471-2164-13-738

Shi, L., Wang, J., Wang, X., Zhang, Y., Song, Z., Cai, M., & Zhou, X. (2019). Transcriptome and metabolome analyses reveal global behaviour of a genetically engineered methanol-independent Pichia pastoris strain. Process Biochemistry, 76(August 2018), 46–54. https://doi.org/10.1016/j.procbio.2018.10.014

Wang, X., Wang, Q., Wang, J., Zhou, M., Shi, L., Zhou, X., … Shen, W. (2016). Mit1 Transcription Factor Mediates Methanol Signaling and Regulates the Alcohol Oxidase 1 ( AOX1 ) Promoter in Pichia pastoris. Journal of Biological Chemistry, 291(12), 6245–6261. https://doi.org/10.1074/jbc.m115.692053

Sequence and Features

Assembly Compatibility:

• 10
  INCOMPATIBLE WITH RFC[10]

  Illegal PstI site found at 1995
  
• 12
  INCOMPATIBLE WITH RFC[12]

  Illegal PstI site found at 1995
  
• 21
  INCOMPATIBLE WITH RFC[21]

  Illegal BglII site found at 2453
  
• 23
  INCOMPATIBLE WITH RFC[23]

  Illegal PstI site found at 1995
  
• 25
  INCOMPATIBLE WITH RFC[25]

  Illegal PstI site found at 1995
  
• 1000
  COMPATIBLE WITH RFC[1000]