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"In silico"


From Wikipedia
If the target host* of a phage therapy treatment is not an animal the term "biocontrol" (as in phage-mediated biocontrol of bacteria) is usually employed, rather than "phage therapy".

In silico
From:"Genomics,Proteomics and Clinical Bacteriology",N.Woodford and Alan P.Johnson

Phrase that emphasizes the fact that many molecular biologists spend increasing amounts of their time in front of a computer screen, generating hypotheses that can subsequently be tested and (hopefully) confirmed in the laboratory.


Phage Therapy is influenced by:

Phage therapy is influenced by:

Country : the epidemiological situation is different from country to country in terms of circulating bacteria and bacteriophages. Example: lytic phages from Italy may be no active on the same bacteria (genus and species) isolated from another country and vice versa.
Temporariness
Mutation rate
Phenotypical delay
Phage cocktail

My point of view

Sunday, 10 January 2010

Step by step: comparisons among D29 phage,M.marinum,M.ulcerans and M.smegmatis



I have compared all D29 mycobacteriophage cds with the M.marinum genome by different software.

D29 phage,like L5 ,Bxz2 and TM4 does not grows on M.marinum.

I have found good relations with M.marinum genome and D29 phage cds ( cds 50,cds 33,cds 46, cds 28,cds 36, cds 34 and cds 64).

All these D29 cds have been compared
after with M.smegmatis and M.ulcerans genomes confirming the presence of relation constantly.

I have compared D29 cds 50 that is corresponding to mycobacterial Thymidylate synthase with the corresponding three mycobacterial genes.

After i have found the structure for each protein.


Comparisons with gp48 protein


Comparisons between thyX proteins





Protein Structure

From Wikipedia

Alpha helix

Beta sheet

gp48 D29 phage helix protein

gp48 protein secondary structure model







thyX helix protein M.marinum

thyX M.marinum protein secondary structure model





thyX helix protein M.smegmatis

thyX M.smegmatis protein secondary structure model





thyX helix protein M.ulcerans

thyX M.ulcerans protein secondary structure
model




Information



probable thymidylate synthase (ec 2.1.1.148) (ts) (tsase) (gp48)

Probable thymidylate synthase




Open Blast Search of in UniProtKB and Paste in the window this fasta sequence (gp48 D29 mycobacterium phage protein):

>Sequence
MKVQLIASTILEDPSWAGTDYVGDDETVTSADELAEFAGRNCYL
SFDRPNPKTRENVDYL
NHILDVGHESVLEHSSATFYIEASRSVLT
ELERHRHLSFSVVSQRYVDPTELGIHVPPAF
TELSGSDADKAKE
VLLDVQSFAQEAYEYLVHIFSDAGFPRKKAREAARAVLPNMTNS
PMV
VTGNHRAWRYVIKNRWHEAADAEIRELAGELLRQLREIAP
NTYQDIPTEPYSYGG


after press the key Blast.