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The international ImMunoGeneTics information system®Coordinator: M.-P. Lefranc, Montpellier, France http://imgt.cines.fr
Analysis of the sequences, genes and3D structures
of the immunoglobulins, T cell receptors and MHC using the IMGT databases, tools and Web
resourceshttp://imgt.cines.fr
Marie-Paule LefrancUniversité Montpellier, CNRS
Institut Universitaire de France
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The international ImMunoGeneTics information system®Coordinator: M.-P. Lefranc, Montpellier, France http://imgt.cines.fr
IMGT domain of research: the adaptive immune system
Immunoglobulin
B cellT cell
T cell Receptor MHC
peptide
Trimolecular complex
Vertebrates
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Immunoglobulin IgG
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IMGT
Immunoglobulin (IG) T cell receptor (TR)
Membrane IgM T cell receptor
Heavy chain
Light chain
Alpha - Beta
Gamma - Delta
Contribution of the2 V-DOMAINs
to the antigen binding siteV-J-REGION
V-J-REGION
V-D-J-REGION
V-DJ-REGION
The adaptive immune system – The biological context
V-DOMAIN
V-DOMAIN
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Immunoglobulin IgMhttp://imgt.cines.fr
1 V-DOMAIN4 C-DOMAINs
1 V-DOMAIN
1 C-DOMAINLight chain
Heavy chain mu
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Immunoglobulin synthesis
rearrangedDNA
mRNA
genomic DNA(IGH Locus 14q32)
5’ 3'
V D J C
5’ 3'
2 x 1012 different IGper individual
http://imgt.cines.fr
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Immunoglobulin (IG) synthesis
http://imgt.cines.fr
2 x 1012
DIFFERENT ANTIBODIES
5 ' 5 '3 ' 3 'x 1000
6300 POTENTIAL RECOMBINATIONS POTENTIAL RECOMBINATIONSN-DIVERSITY
SOMATIC MUTATIONS
ABOUT POSSIBILITIES3.5 x 105ABOUT POSSIBILITIES6.3 x 106
185 +165
15 0FUNCTIONAL IG GENES
5 ' 3 '
V D J C
39 - 4 6 x 2 3 x 6 34 - 37 x 5 Kappa30 - 33 x 4 -5 Lambda
5 ' 3 '
V J CHEAVY CHAIN LIGHT CHAIN
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5' 3'
An example of V-GENE
V-INTRONL-PART1 V-REGIONL-PART2
1st-CYS23
2nd-CYS104
DONOR
-SPLICE
ACCEPTOR
-SPLICE
5'UTR 3'UTR
V-HEPTAMER
V-NONAMERV-SPACER
V-RS
tgagagctcc gttcctcacc atggactgga cctggaggat cctcttcttg gtggcagcag 60ccacaggtaa gaggctccct agtcccagtg atgagaaaga gattgagtcc agtccaggga 120gatctcatcc acttctgtgt tctctccaca ggagcccact cccaggtgca gctggtgcag 180tctggggctg aggtgaagaa gcctggggcc tcagtgaagg tctcctgcaa ggcttctgga 240tacaccttca ccggctacta tatgcactgg gtgcgacagg cccctggaca agggcttgag 300tggatgggat ggatcaaccc taacagtggt ggcacaaact atgcacagaa gtttcagggc 360agggtcacca tgaccaggga cacgtccatc agcacagcct acatggagct gagcaggctg 420agatctgacg acacggccgt gtattactgt gcgagagaca cagtgtgaaa acccacatcc 480tgagggtgtc agaaacccaa gggaggaggc ag
>X62106.0|HSVI2|Homo sapiens VI-2 gene for immunoglobulin heavy chain
aa gaggctccct agtcccagtg atgagaaaga gattgagtcc agtccagggagatctcatcc acttctgtgt tctctcca
tgaaa acccacatcctgagggtg
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5' 3'5'UTR 3'UTR
An example of D-GENE
D-REGION
5’D-HEPTAMER
5’D-NONAMER5’D-SPACER
>J00256|IGHD7-27*01|Homo sapiens D-GENE
3’D-NONAMER
3’D-HEPTAMER3’D-SPACER
ccagccgcag ggtttttggc tgagctgaga accactgtgc taactgggga cacagtgatt 60ggcagctcta caaaaaccat gctcccccgg g
c tgagctgaga ac attggcagctct
5’D-RS 3’D-RS
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5' 3'5'UTR 3'UTR
An example of J-GENE
>J00256|IGHJ1*01|Homo sapiens J-GENE
J-REGION
J-HEPTAMER
J-NONAMERJ-SPACER
DONOR
-SPLICE
J-TRP118
accccgggct gtgggtttct gtgcccctgg ctcagggctg actcaccgtg gctgaatact 60tccagcactg gggccagggc accctggtca ccgtctcctc aggtgagtct gctgtactgg 120ggatagcggg gagccatgtg tactgggcca agcaagggct ttggcttcag 170
gcccctgg ctcagggctg act
Heavy chain WGXG (J-TRP)Light chain FGXG (J-PHE)
J-RS
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JUNCTION
gatttgtgcgaaa gtggtgactgctat actcctgg
3’V-REGION D-REGION 5’J-REGION
agcatattgtg acaactggttcg
Immunoglobulin V-D-J generationof sequence diversity
N-REGION
tcctacc
N-REGION
ga
C A P Y R G D T Y D Y S Wtgtgcgcca ggggtgactactattgt gcg cca tac cgg ggt gac act tat gat tac tcc tgg
http://imgt.cines.fr
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IMGT Repertoire 8,000 HTML pages HTML
Chromosomal localizationsLocus representations, …
IMGT Bloc-notesInteresting linksThe IMGT Immunoinformatics page
(databases, tools, resources, …)
IMGT EducationTutorials, IMGT Lexique, …
IMGT® Web Resources
The international ImMunoGeneTics information system®Coordinator: M.-P. Lefranc, Montpellier, France http://imgt.cines.fr
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Human IGH locus
Chromosome14q32.33
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Human IGHV genes at chromosome 14q32.33
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http://imgt.cines.fr
Alignmentof alleles
ProteinDisplay
Collier de Perles
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The eleven IMGT amino acid classes according to the physico-chemical properties
(Pommié et al. J. Mol Recogn. 17:17-32, 2004)
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IMGT databases and tools
The international ImMunoGeneTics information system®Coordinator: M.-P. Lefranc, Montpellier, France http://imgt.cines.fr
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IMGT
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IMGT
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http://imgt.cines.fr
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The international ImMunoGeneTics information system®Coordinator: M.-P. Lefranc, Montpellier, France http://imgt.cines.fr
IMGT/V-QUEST
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Example of IMGT/V-QUEST results
V-GENE J-GENEJUNCTION
http://imgt.cines.fr
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IMGT
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IMGT
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IMGT
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IMGT
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IMGT
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IMGT
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IMGT
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IMGT
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IMGT
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IMGT/JunctionAnalysis
The international ImMunoGeneTics information system®Coordinator: M.-P. Lefranc, Montpellier, France http://imgt.cines.fr
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View from above the CDRsSide view of the V-DOMAINs
V-J junctionV-D-J junction
V-DOMAINs: VH and V-KAPPA http://imgt.cines.fr
Mouse(Mus musculus) E5.2Fv CDR3-IMGT= Complementarity determining region (105-117)V-J junction (104-118)V-D-J junction (104-118)
V-KAPPAVH V-KAPPAVH
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IMGT
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IMGT
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IMGT
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IMGT
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IMGT/3Dstructure-DB and
IMGT/StructuralQuery
The international ImMunoGeneTics information system®Coordinator: M.-P. Lefranc, Montpellier, France http://imgt.cines.fr
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IMGT
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Tot
NCo
Pol
HB
NPol
Cov
SS
Number of non covalent atomic
Total number of atomic pair contacts
Number of polar atomic pair contactsNumber of hydrogen bonds
Number of non polar atomic pair contactsNumber of covalent links (other than chain covalent links)Number of disulfide bridges
41V - TRP (W)
chain : 1u8k_B
From IMGT Colliers de Perles or from domain/chain sequence
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IMGT Collier de Perleshttp://imgt.cines.fr