Sunday, 21 February 2010

2.PCR Method for Genotype Analysis of Mycobacterium ulcerans


From:

Development of a PCR Assay for Rapid Diagnosis of Mycobacterium ulcerans Infection

"For the PCR, we isolated an M. ulcerans-specific DNA fragment, 1,109 bp long, which is repeated at least 50 times throughout the genome."



I have verified by "In silico " Restriction Site Analysis the AluI action
on M.ulcerans genome.

By AluI I have found 16975 restriction sites and 16976 restriction fragments.

From M.ulcerans genome the position :228378-229743
is corresponding to IS2404 sequence and
from the restriction Map the position:228599-229707
is corresponding to one restriction fragment by AluI cut.






Restriction Analysis of IS2404 DNA sequence





I have also verified if the indicated primers were effective:

cggcaggctgaagtaactgcc (MU1)

tgtgcagtgaagtaactgcc (MU2)

but
with these primers by FastPCR software I do not have had any results .


On the contrary if I use these primers:

1F2_1_48-69 atctttggtgccgcgctattgg

1R10_1_1135-1156 tcgaaggtgacgtcgcgtatcc

I have had the results:


In silico Primer(s) search for: is2404dnasequenceconsistingof1366bases.

1f2_1_48-69 5'-atctttggtgccgcgctattgg

Position: 48->69 22bp 100% Tm = 60,2°C

5-atctttggtgccgcgctattgg->

||||||||||||||||||||||

actagaaaccacggcgcgataaccccgg

1r10_1_1135-1156 5'-tcgaaggtgacgtcgcgtatcc

Position: 1135<-1156 22bp 100% Tm = 61,8°C

<-cctatgcgctgcagtggaagct-5

||||||||||||||||||||||

ctggatacgcgacgtcaccttcgacgaa

1f2_1_48-69 5'-atctttggtgccgcgctattgg

1r10_1_1135-1156 5'-tcgaaggtgacgtcgcgtatcc

PCR product size: 1109bp