news flash:life was just discovered on Mars!scientists have begun to examine Mar

Question

news flash:life was just discovered on Mars!scientists have begun to examine Martian life and find that it is cellular, and probabaly driven from an early meteorite-delivered colonization event from the Earth when the planets were both still young .analysis of Martian cell reveals that Mars life uses the same DNA and RNA that we do,but all the enzyme catalysts are also made of nucleic acids, rather than of proteins.you find the Martian equivalent to the Terran protein restriction endonuclease Sau 3ai.describe the chemical means by which this enzyme is likely to recognise its substrate with high specificity.a draw would help

Explanation / Answer

Sau3AI large type II restriction enzyme with sequence homology to protein MutH ( mismatch repair). Sau3AI is a pseudo-dimer containing two similar domains. Sau3AI functions in a nonlinear dependence of cleavage activity depending on the availability of enzyme concentration and nature of the substrates having unique recognition sites.The active form of Sau3AI is a dimer of a pseudo-dimer. it is also having distant recognition sites which are considered together through modulating the DNA looping induced by the simultaneous binding of twoSau3AI molecules to the DNA.

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