AutoGRAPH - FAQ
Region containing markers/anchors (that belong to the same chromosomes) contiguous between 2 genomes and that may have alterations in gene ordering. (See also Output interpretation)
Region containing markers/anchors contiguous between 2 genomes without alteration of order or orientation. (See also Output interpretation)
Limits between 2 CSs and/or 2 CSOs. (See also Output interpretation)
It correponds to a number of genes/markers (on the tested chromosome) set by users that makes an interruption in the colinearity of a Conserved Segment.
All genes of a species have precise locations and are consequently (pre)ordered within genomes. AutoGRAPH algorithm tests the difference of order for 2 adjacent markers on tested chromosome.
It permits to identify CSO(s) in a CS.
For examples: it allows user to identify:
If we have respectively these orders of anchors (orthologous genes) in 2 species:
|On reference species:||1||2||3||4||5||6||7||8||9||10|
|On tested species:||1||2||3||4||5||10||9||8||7||6|
|AutoGRAPH adjacency test:||1||1||1||1||1||5||-1||-1||-1||-1|
|On reference species:||1||2||3||4||5||6||7||8||9||10||11|
|On tested species:||1||2||3||7||8||9||10||11||12||13||14|
|AutoGRAPH adjacency test:||1||1||1||4||1||1||1||1||1||1||1|
Select the minimum number of markers/anchors to define a CS(O) and to be listed.
These informations are stored and displayed in the results array at the bottom of the figure and in a flat file to be downloaded.
Density in breakpoint regions is defined as a number of marker(s) in a window of 1Mb surronding the midpoint of the breakpoint region on the reference chromosome.
A singleton is defined as a single gene or marker that identifies the comparable region in a tested genome, but does not cluster with other genes or markers to form a segment.
Singleton are identified by (**) on synteny map (Reference genome) but the tested geneome is not displayed the figure in order to be an easier way to visualize CS(s) and CSO(s).
Datasets are flat files containing 3 fields in column tabulated format.
The first field corresponds to the marker/gene identifiers (example: BRCA, ENSCAFG00000006289...).
The second is the chromosome attribution (example: hsa21, 21 or HSA_21...) : it must be unique for the dataset of reference !
The last field is the localization of the marker/gene on the chromosome(s): it must be an integer in order to apply ordering function.
No, AutoGRAPH orders your datasets before constructing synteny map so you don't have to (pre)order your datasets yourself.
Yes, you can save synteny map resulting from AutoGRAPH analyses by click on the links "Save Image" on the left top of the map or by right click on the image and select "save as".
No, there is no need to install a java console to launch AutoGRAPH. All analysis run on the server and not on the client computer.
Two file formats are available (PNG and JPEG) but we are working to develop other image formats using GD library (gif, bmp...)
The Ensembl web site provides the Biomart tool to facilitate downloads of gene positions for many species.
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