mcjA蛋白|大肠杆菌mcjA蛋白|大肠杆菌mcjA重组蛋白

Research Areas

Others

Uniprot ID

Q9X2V7

Gene Names

mcjA

Alternative Name(s)

(MccJ25)(Class II lasso peptide)(Ribosomally synthesized and post-translationally modified peptide)(RiPP)

Lead Time

3-7 business days

Organism

Escherichia coli

Source

E.coli

Expression Region

38-58aa

Protein Length

Full Length of Mature Protein

Tag Info

N-terminal 6xHis-KSI-tagged

Target Protein Sequence

GGAGHVPEYFVGIGTPISFYG

MW

17.5 kDa

Purity

Greater than 90% as determined by SDS-PAGE.

Endotoxin

Not test.

Biological_Activity

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Form

Liquid or Lyophilized powder

Buffer

If the delivery form is liquid, the default storage buffer is Tris/PBS-based buffer, 5%-50% glycerol. If the delivery form is lyophilized powder, the buffer before lyophilization is Tris/PBS-based buffer, 6% Trehalose, pH 8.0.

Reconstitution

We recommend that this vial be briefly centrifuged prior to opening to bring the contents to the bottom. Please reconstitute protein in deionized sterile water to a concentration of 0.1-1.0 mg/mL.We recommend to add 5-50% of glycerol (final concentration) and aliquot for long-term storage at -20℃/-80℃. Our default final concentration of glycerol is 50%. Customers could use it as reference.

Storage

The shelf life is related to many factors, storage state, buffer ingredients, storage temperature and the stability of the protein itself. Generally, the shelf life of liquid form is 6 months at -20℃/-80℃. The shelf life of lyophilized form is 12 months at -20℃/-80℃.

Notes

Repeated freezing and thawing is not recommended. Store working aliquots at 4℃ for up to one week.

Relevance

Peptide antibiotic that functions through inhibition of the bacterial DNA-dependent RNA polymerase (RNAP). Inhibits transcription by binding deep within RNAP secondary channel, where it sterically blocks the folding of the trigger loop, which is essential for efficient catalysis. In addition, it also seems to restrict access of nucleotide substrates to the catalytic center, and shows a partially competitive mode of inhibition with them. Exhibits potent bacteriocidal activity against a range of Enterobacteriaceae, including several pathogenic E.coli, Salmonella and Shigella strains. Also acts on the cytoplasmic membrane of Salmonella newport, producing alteration of membrane permeability and disruption of the subsequent gradient dissipation, which inhibits several processes essential for cell viability, such as oxygen consumption. Induces bacterial filamentation in susceptible cells in a non-SOS-dependent way, but this phenotype may result from impaired transcription of genes coding for cell division proteins.

Function

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