utr prediction progrmas for trypanosoma bruceiwangj/rna/slides/maria.pdf · microsoft powerpoint -...
TRANSCRIPT
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UTR PREDICTION PROGRMAS FOR TRYPANOSOMA BRUCEI
Maria Moutafis
Masters Thesis Computational Biology
December 2007
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Biology Basics
translation
Cell Nucleus DNA
ProteinRNA
transcription
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Cell Type
Eukaryotic cellProkaryotic cell
micro.magnet.fsu.edu/cells/bacteriacell.html http://www.modares.ac.ir/elearning/mnaderi/Genetic%20Engineering%20course%20II/images/wpe16.gif
BacteriaVirus
AnimalsFungiPlantsProtists
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Eukaryotic Cell
Mitosis
http://www.biology.iupui.edu/biocourses/N100/images/8mitosiscropped.jpg
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The Nucleus
http://micro.magnet.fsu.edu/cells/plants/images/cellnucleus.jpg
Chromosomes are made of gene which contain the cell’s genetic material
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Genes
http://www.oncolink.com/library/images/id818‐1.gif
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DNA
http://www.ualr.edu/botany/chromosome.jpg
Must unwind to undergo replication
http://www.llnl.gov/str/June03/gifs/Stubbs1.gif
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Transcription
http://fig.cox.miami.edu/~cmallery/150/gene/c7.17.7b.transcription.jpg
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RNA
http://www.makingthemodernworld.org.uk/learning_modules/biology/01.TU.03/illustrations/01.IL.09.gif
3 TYPES OF
mRNA – messenger RNA
tRNA – transfer RNA
rRNA – ribosomal RNA
All of which assist in the process of translation
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RNA vs. DNA – structural differences
http://www.search.com/reference/DNA
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Translation
http://biology.unm.edu/ccouncil/Biology_124/Images/RNAtranslation.jpeg
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Proteins
http://cropandsoil.oregonstate.edu/classes/css430/lecture%209-07/figure-09-03.JPG
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Trypanosoma brucei
http://www.sciam.com/media/inline/000E7E77-EEBB-1E36-82FC809EC5880000_1.jpg
http://www.nature.com/ng/journal/v32/n3/images/ng1102-335-I1.jpg
• Protists• Cause African Trypanosomiasis also known as African Sleeping Sickness• There are 2 subspecies of T. brucei; T.b.brucei, T.b.gambiense, T.b.rhodesiense• Has 2 hosts: an insect vector (tsetse fly) and a mammalian host• Found in Africa
http://www.ilri.org/InfoServ/Webpub/Fulldocs/IlradRe1989v7n1/FIG%201%20P1.gif
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T. Brucei – Life Cycle
Human StagesTsetse Fly Stages
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Areas Affected by T. brucei36 countries in sub-Saharan Africa
Facts: http://www.who.int/tdr/diseases/tryp/diseaseinfo.htm
http://pathmicro.med.sc.edu/parasitology/tryp-map.jpg
T.b.rhodesiense
T.b.gambiense west & central Africa
east & south Africa
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African Trypanosomiasis
General symptoms (appear 1-4 weeks after fly bite),They include:• Swollen, red, painful nodule at site of fly bite • Swollen lymph nodes • Severe headaches • Fever • Sweating • Irritability• Insomnia at night • Confusion• Seizures• Extreme fatigue• Uncontrollable urge to sleep – in late stage, this leads
to coma
Facts: http://www.nlm.nih.gov/medlineplus/ency/article/001362.htm
Photos:http://www.stanford.edu/class/humbio103/ParaSites2001/trypanosomiasis/trypano.htm
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Disease Prevention & Control
Treatment
Medications used to treat this disorder include:• Suramin (Antrypol) – IV form, adverse side-effects• Melarsoprol – used for late stage, serious side-effects,
may be fatal• Pentamidine – not used in late stage, many strains are
resistant to it• Eflornithine
Exams and Tests
A physical examination may show signs of meningoencephalitis (inflammation of the brain and meninges).
Common Tests include the following:• Blood smear • Lymph node aspiration • CSF test • CATT test
Prevention & Control are extremely difficult. There is no vaccine for the disease.
WHO suggests:• Wearing protective clothing, such as long-sleeved shirts and pants. • Using insect repellant. • Using bed netting when sleeping.• Avoid bushes (they are the breeding and resting site for the fly).
Note: some of these suggestions are difficult to follow in such remote areas of the Africa
http://www.who.int/tdr/diseases/tryp/diseaseinfo.htm
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Data CollectionPart 1
Part 4Part 3
Part 2
http://www.genedb.org/ http://www.tigr.org/tdb/e2k1/tba1/
http://compbio.dfci.harvard.edu/tgi/http://compbio.dfci.harvard.edu/tgi/cgi-bin/tgi/cat_download.pl?db=tbest
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BLASTPart 1
Part 4Part 3
Part 2
http://www.ncbi.nlm.nih.gov/BLAST/
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ORBIT
Two Possible Outcomes
http://xanthos.bioinformatics.rit.edu/~shuba/bin/orbit.cgi
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UTR Generation
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True UTRs
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?CMD=Limits&DB=nuccore
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UTRscan
--------------> UTRscan Results <------------------- Processed sequences: 1 ---------------------------------------------------- Pattern = HISTONE3 ---------------------------------------------------- Pattern not found ---------------------------------------------------- Pattern = IRE ---------------------------------------------------- Pattern not found ---------------------------------------------------- Pattern = SECIS ---------------------------------------------------- Pattern not found ---------------------------------------------------- Pattern = APP ---------------------------------------------------- Pattern not found ---------------------------------------------------- Pattern = CPE ---------------------------------------------------- Pattern not found ---------------------------------------------------- Pattern = TGE ---------------------------------------------------- Pattern not found ---------------------------------------------------- Pattern = NANOS ---------------------------------------------------- Pattern not found ---------------------------------------------------- Pattern = 15-LOX-DICE ---------------------------------------------------- Found 13 matches in 1 sequences EM_OM:M27214 :[2066,2084] :GCCCACCCTCT CCCCC AAG EM_OM:M27214 :[2085,2103] :CCCTGCCCTCT TCCCC AAG EM_OM:M27214 :[2104,2122] :CCCTGCCCCT TTCCCC AAG EM_OM:M27214 :[2123,2142] :CCCCATCCTCT TTCCCC AAG EM_OM:M27214 :[2143,2161] :CCCCGCCCTCT TCCCC AAG EM_OM:M27214 :[2162,2180] :CCCCGCCCTCT TCCCC AAG EM_OM:M27214 :[2181,2199] :CCCCACCCTCT TCCCC AAG
Data Entry Results
http://www.ba.itb.cnr.it/BIG/UTRScan/
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PatSearchData Entry
Results Received
Submitted
http://www.ba.itb.cnr.it/BIG/PatSearch/
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Which To Choose?
• Which is more user‐friendly?
• Which gives more accurate results?
• Which is faster?
• Which is more reliable?
I have decided, now it’s your turn to choose!