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Natural Science Forum / Biology / Biology / February 2007



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Looking for promoter sequences

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poojamajmudar@gmail.com - 12 Feb 2007 17:07 GMT
Hello,

I am trying to look for promoters of certain genes. I have tried using
the NCBI websitee, but am not completely sure how to go about looking
for them.

I need some help in doing the same.

Thanks

Pooja
maheshee11@gmail.com - 12 Feb 2007 18:30 GMT
On Feb 12, 10:07 pm, "poojamajmu...@gmail.com"
<poojamajmu...@gmail.com> wrote:
> Hello,
>
[quoted text clipped - 7 lines]
>
> Pooja

hello. Pooja,

try the following site where you will find links to several online
promoter databases, and i hope you will find "promoters of certain
genes" in one of the databases.
the site is

http://biophilessurf.info/

regards
mahesh
poojamajmudar@gmail.com - 13 Feb 2007 14:51 GMT
On Feb 12, 1:30 pm, "maheshe...@gmail.com" <maheshe...@gmail.com>
wrote:
> On Feb 12, 10:07 pm, "poojamajmu...@gmail.com"
>
[quoted text clipped - 8 lines]
>
> > Thanks

> > Pooja
>
[quoted text clipped - 9 lines]
> regards
> mahesh

Hi Mahesh,

Thanks for your reply.

I did go through the eukaryotic promoter database link that was put up
on your website. I put the name of the proteins of interest, to look
up their promoter sequences and I woul dnot get any answer.

What should I do next??

Pooja
Bob - 14 Feb 2007 02:56 GMT
>I did go through the eukaryotic promoter database link that was put up
>on your website. I put the name of the proteins of interest, to look
>up their promoter sequences and I woul dnot get any answer.
>
>What should I do next??

Mot sure what it is you are trying to do. The whole concept of a
promoter for eukaryotic genes is something of a can of worms.

You might want to look at a recent paper:
Nature Methods - 3, 917 - 922 (2006)
Rational design of a super core promoter that enhances gene expression
Tamar Juven-Gershon, Susan Cheng & James T Kadonaga

Might give you some ideas.

Beyond that, how about expanding what it is you really want to know.

bob
poojamajmudar@gmail.com - 14 Feb 2007 14:59 GMT
> On 13 Feb 2007 06:51:55 -0800, "poojamajmu...@gmail.com"
>
[quoted text clipped - 19 lines]
>
> bob

Hi Bob,

Thanks for the input. what I am trying to look for are promoter
sequences of certain Adhesion proteins such as PECAM-1, ICAM-1, E-
Selectin .etc. which are expressed ont the surface of endothelial and
certain other immune cells. I want to look if p53, the tumor
suppressor gene consensus sequence is present on the promoters of
these adhesion proteins.

Pooja
maheshee11@gmail.com - 14 Feb 2007 19:09 GMT
On Feb 14, 7:59 pm, "poojamajmu...@gmail.com"
<poojamajmu...@gmail.com> wrote:

> > On 13 Feb 2007 06:51:55 -0800, "poojamajmu...@gmail.com"
>
[quoted text clipped - 30 lines]
>
> Pooja

hello, pooja,

why did you try EPD only? you could try

TRRD
Cold Spring Harbor Laboratory Mammalian Promoter Database
and there are many more.

regards
mahesh
Bob - 15 Feb 2007 04:07 GMT
>> On 13 Feb 2007 06:51:55 -0800, "poojamajmu...@gmail.com"
>>
[quoted text clipped - 28 lines]
>suppressor gene consensus sequence is present on the promoters of
>these adhesion proteins.

Ok, the point is to remember that "promoter" is not well defined for
eukaryotic genes. Promoters are quite variable and diffuse; key
elements of the promoter may be quite some distance away -- upstream
or downstream. You need to look and see whether it has any particular
type of promoter element, such as a TATA box or INR. You may want to
look in some detail at papers on these genes, and see if there is info
about what the key promoter elements are. In particular, do you
understand the p53 promoter?

bob
 
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