How do I sequence the area around a random trangene insert?

[nathan hunkapiller]

For my genotyping needs, I would like to design an assay to discriminate alleles of wild type mice from those that have one and also two copies of a randomly inserted transgene that I created. Problem is I don't know where the insert landed.

I know the sequence of the insert and was hoping to sequence outward from the flanking ends. Are there good methods for sequencing directly from genomic DNA without performing PCR? I obviously can't design primers outside of the insert.

[ECO]

Hey Nathan,

Can't respond in detail now, but start your search for LAM-PCR. Pretty standard method that works well.

-=E

[BioHak]

Region-Specific Extraction

I worked with this group a while ago, and the technology was quite promising.

narrated ppt from European Federation of Immunohistocompatibility:

http://www.generationbiotech.com/docs/RSE_introduction_DF_narrated_090416.pps

[AlexB]

We have used so-called vectorette system in the past quite succesfully. Works well on bacterial as well as eukaryotic DNA.
Our protocol that time:

http://www.scienceboard.net/resources/protocols.asp?action=article&protocol_id=592&criteria=

My guess is that this procedure required cloning and such at that time . Now I would choose to simply sequence the product and separate out the mixture of sequences

And some links with references:

http://www.pcrlinks.com/variants/vectorette_pcr.htm

Cheers
Alex