Unconfigured Ad

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • Ganesh Ujwal
    Member
    • Dec 2014
    • 16

    #1

    Using the IMGT/GENE-DB service to find RSS

    I'm trying to get the data for the Human and Mouse 12 and 23 Recomination Signal Sequences (RSS), to run a classification algorithm on it. I'm not a biologist, so I apologise in advance for my misunderstandings and confusion.

    A version of the data is available here, but I thought I would try to get it from www.imgt.org, if possible. There is also another slightly different version available for the mouse here.

    I'm trying to follow the instructions at IMGT-FAQ to obtain Recombination Signal Sequences for the mouse.

    Here is what I have selected at the search page:
    Code:
    Identification:
    Species : Mus Musculus
    GeneType: any
    Functionality: functional
    MolecularComponent: any
    Clone name: <blank>
    
    IMGT group: IGHV
    IMGT subgroup: any
    IMGT gene: <blank>
    I'm not clear what "Locus", "Main locus", and "IGMT group" mean here exactly. Specifically, what is the difference between "Locus" and "Main locus"?

    I think, but am not sure, that IGHV corresponds to V genes in the Immunoglobulin heavy locus (IGH@) on chromosome 14, where locus here denotes collections of genes. Clarifications and corrections appreciated.

    I would have expected that the IGH locus would correspond to "IMGT group" entries like "IGHJ, IGHV" etc, and the IGK locus would correspond to IMGT group entries like "IGK, IGKJ, IGKV", but no matter what I select for Locus, it does not change the possible entries for "IMGT group".

    Running the search gives

    Number of resulting genes : 218 Number of resulting alleles : 350

    As instructed, I went to the bottom, selected "Select all genes", clicked on "Choose label(s) for extraction", and selected "V-RS".

    I got

    Number of results=98
    The first few results were
    Code:
    >X02459|IGHV1-4*02|Mus musculus_BALB/c|F|V-RS|395..432|38 nt|NR| | | | 
    |38+0=38| | |
    cacagtggtgcaaccacatcccgactgtgtcagaaacc
    
    >X02064|IGHV1-54*02|Mus musculus|F|V-RS|295..332|38 nt|NR| | | | |38+0=38| 
    | |
    cacagtgttgcaaccacatcctgagtgtgtcagaaatc
    
    >M34978|IGHV1-58*02|Mus musculus_A/J|P|V-RS|554..560|7 nt|NR| | | | 
    |7+0=7|partial in 3'| |
    cacagtg
    Ok, now I'm confused. The lengths of the RSS should be 28 or 39. but I counted lengths of 4,7, 31, 38, and 39. Are the results here not supposed to contain the 12 and 23 RSS?

    So, I must be misunderstanding things here. Possibly many things. Any explanations and clarifications are appreciated.

Latest Articles

Collapse

  • kinpict.com
    Reply to 16S/ITS Profiling vs. Shotgun Metagenomics: What Changes in Your Workflow?
    by kinpict.com
    The part about this topic feels surprisingly grounded, and the details on the page is the bit that made me slow down. I’d keep <a href="https://kinpict.com/">ai family photo generator</a> bookmarked for later.
    Today, 06:37 PM
  • SEQadmin2
    16S/ITS Profiling vs. Shotgun Metagenomics: What Changes in Your Workflow?
    by SEQadmin2





    NGS has revolutionized clinical microbiology by offering new ways to identify and surveil pathogens without prior knowledge of the target. One popular approach is 16S rRNA and ITS amplicon sequencing, which targets specific microbial markers. But studies are increasingly incorporating shotgun metagenomics, a technique that sequences all DNA from a sample without targeting specific microbial markers. This approach allows more detailed taxonomic classification,...
    10-30-2026, 06:46 AM

ad_right_rmr

Collapse

News

Collapse

Topics Statistics Last Post
Started by SEQadmin2, 11-12-2026, 07:59 AM
0 responses
28 views
0 reactions
Last Post SEQadmin2  
Started by SEQadmin2, 11-05-2026, 09:25 AM
0 responses
35 views
0 reactions
Last Post SEQadmin2  
Started by SEQadmin2, 11-03-2026, 11:54 AM
2 responses
56 views
0 reactions
Last Post kinpict.com  
Started by SEQadmin2, 10-28-2026, 09:57 AM
0 responses
175 views
0 reactions
Last Post SEQadmin2  
Working...