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3cdf

From Proteopedia

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kI O18/O8 Y87H immunoglobulin light chain variable domain

Structural highlights

3cdf is a 6 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Method:	X-ray diffraction, Resolution 1.53Å
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

KV133_HUMAN V region of the variable domain of immunoglobulin light chains that participates in the antigen recognition (PubMed:24600447). Immunoglobulins, also known as antibodies, are membrane-bound or secreted glycoproteins produced by B lymphocytes. In the recognition phase of humoral immunity, the membrane-bound immunoglobulins serve as receptors which, upon binding of a specific antigen, trigger the clonal expansion and differentiation of B lymphocytes into immunoglobulins-secreting plasma cells. Secreted immunoglobulins mediate the effector phase of humoral immunity, which results in the elimination of bound antigens (PubMed:20176268, PubMed:22158414). The antigen binding site is formed by the variable domain of one heavy chain, together with that of its associated light chain. Thus, each immunoglobulin has two antigen binding sites with remarkable affinity for a particular antigen. The variable domains are assembled by a process called V-(D)-J rearrangement and can then be subjected to somatic hypermutations which, after exposure to antigen and selection, allow affinity maturation for a particular antigen (PubMed:20176268, PubMed:17576170).^[1] ^[2] ^[3] ^[4]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

Mechanisms of amyloidogenesis are not well understood, including potential structural contributions of mutations in the process. Our previous research indicated that the dimer interface of amyloidogenic immunoglobulin light chain protein AL-09 is twisted 90 degrees relative to the protein from its germline sequence, kappaI O18/O8. Here we report a systematic restoration of AL-09 to its germline sequence by mutating the non-conservative somatic mutations located in the light chain dimer interface. Among these mutants, we find a correlation between increased thermodynamic stability and an increase in the lag time for fibril formation. The restorative mutant AL-09 H87Y completes the trifecta and restores the dimer interface observed in kappaI O18/O8, emphasizing the potential importance of the structural integrity of these proteins to protect against amyloidogenicity. We also find that adding amyloidogenic mutations into the germline protein illustrates mutational cooperativity in promoting amyloidogenesis.

Structural insights into the role of mutations in amyloidogenesis.,Baden EM, Randles EG, Aboagye AK, Thompson JR, Ramirez-Alvarado M J Biol Chem. 2008 Nov 7;283(45):30950-6. Epub 2008 Sep 2. PMID:18768467^[5]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Teng G, Papavasiliou FN. Immunoglobulin somatic hypermutation. Annu Rev Genet. 2007;41:107-20. PMID:17576170 doi:http://dx.doi.org/10.1146/annurev.genet.41.110306.130340
↑ Schroeder HW Jr, Cavacini L. Structure and function of immunoglobulins. J Allergy Clin Immunol. 2010 Feb;125(2 Suppl 2):S41-52. doi:, 10.1016/j.jaci.2009.09.046. PMID:20176268 doi:http://dx.doi.org/10.1016/j.jaci.2009.09.046
↑ McHeyzer-Williams M, Okitsu S, Wang N, McHeyzer-Williams L. Molecular programming of B cell memory. Nat Rev Immunol. 2011 Dec 9;12(1):24-34. doi: 10.1038/nri3128. PMID:22158414 doi:http://dx.doi.org/10.1038/nri3128
↑ Lefranc MP. Immunoglobulin and T Cell Receptor Genes: IMGT((R)) and the Birth and Rise of Immunoinformatics. Front Immunol. 2014 Feb 5;5:22. doi: 10.3389/fimmu.2014.00022. eCollection 2014. PMID:24600447 doi:http://dx.doi.org/10.3389/fimmu.2014.00022
↑ Baden EM, Randles EG, Aboagye AK, Thompson JR, Ramirez-Alvarado M. Structural insights into the role of mutations in amyloidogenesis. J Biol Chem. 2008 Nov 7;283(45):30950-6. Epub 2008 Sep 2. PMID:18768467 doi:10.1074/jbc.M804822200

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3cdf"

@@ Line 3: / Line 3: @@
 <StructureSection load='3cdf' size='340' side='right'caption='[[3cdf]], [[Resolution|resolution]] 1.53&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[3cdf]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3CDF OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3CDF FirstGlance]. <br>
+<table><tr><td colspan='2'>[[3cdf]] is a 6 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3CDF OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=3CDF FirstGlance]. <br>
-</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[3cdy|3cdy]], [[3cdc|3cdc]]</div></td></tr>
+</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.53&#8491;</td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">kI O18/O8 germline ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
 <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=3cdf FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3cdf OCA], [https://pdbe.org/3cdf PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=3cdf RCSB], [https://www.ebi.ac.uk/pdbsum/3cdf PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=3cdf ProSAT]</span></td></tr>
 </table>
+== Function ==
+[https://www.uniprot.org/uniprot/KV133_HUMAN KV133_HUMAN] V region of the variable domain of immunoglobulin light chains that participates in the antigen recognition (PubMed:24600447). Immunoglobulins, also known as antibodies, are membrane-bound or secreted glycoproteins produced by B lymphocytes. In the recognition phase of humoral immunity, the membrane-bound immunoglobulins serve as receptors which, upon binding of a specific antigen, trigger the clonal expansion and differentiation of B lymphocytes into immunoglobulins-secreting plasma cells. Secreted immunoglobulins mediate the effector phase of humoral immunity, which results in the elimination of bound antigens (PubMed:20176268, PubMed:22158414). The antigen binding site is formed by the variable domain of one heavy chain, together with that of its associated light chain. Thus, each immunoglobulin has two antigen binding sites with remarkable affinity for a particular antigen. The variable domains are assembled by a process called V-(D)-J rearrangement and can then be subjected to somatic hypermutations which, after exposure to antigen and selection, allow affinity maturation for a particular antigen (PubMed:20176268, PubMed:17576170).<ref>PMID:17576170</ref> <ref>PMID:20176268</ref> <ref>PMID:22158414</ref> <ref>PMID:24600447</ref>
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]
@@ Line 31: / Line 32: @@
 __TOC__
 </StructureSection>
-[[Category: Human]]
+[[Category: Homo sapiens]]
 [[Category: Large Structures]]
-[[Category: Baden, E M]]
+[[Category: Baden EM]]
-[[Category: Ramirez-Alvarado, M]]
+[[Category: Ramirez-Alvarado M]]
-[[Category: Randles, E G]]
+[[Category: Randles EG]]
-[[Category: Thompson, J R]]
+[[Category: Thompson JR]]
-[[Category: Amyloid]]
-[[Category: Greek key beta barrel]]
-[[Category: Immune system]]
-[[Category: Immunoglobulin]]
-[[Category: Light chain]]
-[[Category: Variable domain]]

3cdf

From Proteopedia

Current revision

kI O18/O8 Y87H immunoglobulin light chain variable domain

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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