Navigation Links
Newly identified B-cell selection process adds to understanding of antibody diversity
Date:6/9/2014

e three genes come together, a stretch called the third complementarity-determining region, or CDR3.

"CDR3 is thought to be the single most important determinant of antigen binding," explains Arnaout. As a result, in understanding how the body fights infections and in developing new vaccines, immunologists have primarily focused their attention on CDR3, while considering other parts of the antibody, including the elbow region, to play secondary roles.

In their new study, Arnaout and colleagues sequenced 2.8 million VDJ-recombined heavy-chain genes from immature and mature B-cell subsets in mice. "We initially wanted to ask how selection on CDR3 changed antibody repertoires during B-cell maturation," says Arnaout. But, unexpectedly, during the course of the investigation, they found they were instead focused on the antibody's 'elbow' region."

They found that B cells for which antibodies use V genes that encode 'looser' elbows were more likely to mature, regardless of their CDR3 sequence. This effect was both distinct from, and larger than previously described maturation-associated changes in CDR3 in the mice. Furthermore, it had a unique source: Differences in the V genes were hard-coded into the genome, as opposed to the mixed-and-matched combination of V, D and J genes that typically differs from B cell to B cell.

"This discovery was a little like going to watch a concert pianist perform and being mesmerized by her fingers only to realize that music was also coming from her elbows," says Arnaout. "It was something of a shock."

One explanation for how this "loose elbow" promotes survival relates to the bending process of the antibody. "B-cell selection and maturation depend on signaling," he explains. "Antigen binding is the signal, but for it to get to the cell it has to go through the elbow. It, therefore, makes sense that previous experiments have found that disrupting the elbow abolishes signaling without affecting a
'/>"/>

Contact: Bonnie Prescott
bprescot@bidmc.harvard.edu
617-667-7306
Beth Israel Deaconess Medical Center
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Newly identified brain cancer mutation will aid drug development
2. Newly found dinosaur is long-nosed cousin of Tyrannosaurus rex
3. Newly discovered molecule may offer hope for immune disorders and runaway inflammation
4. Newly identified small-RNA pathway defends genome against the enemy within
5. Newly discovered catalyst could lead to the low-cost production of clean methanol
6. Newly discovered marsupial the victim of fatal attraction
7. Newly discovered signaling pathway could impact a variety of autoinflammatory diseases
8. Newly discovered human peptide may become a new treatment for diabetes
9. Attention Vical Incorporated Investors: Vical Misled Investors According to a Newly Filed Class Action
10. Newly identified proteins make promising targets for blocking graft-vs.-host disease
11. UF: Newly discovered tiger shark migration pattern might explain attacks near Hawaii
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/17/2014)... German . Why ... order to reproduce? And why are there two sexes anyway? ... issue of the research journal Molecular Human Reproduction ... from Bielefeld University Bielefeld has compiled this special issue on ... female to copulate with several males in quick succession – ...
(Date:10/16/2014)... wages war on the human body. Battles are ... In pancreatic cancer, this stalemate—known as tumor dormancy—can ... malignant, a phenomena that is poorly understood. ... laboratory of Salvatore Torquato, a Professor of Chemistry ... surrounding tumor dormancy and the switch to a ...
(Date:10/16/2014)... thinking on how the bowel lining develops and, in ... cancer starts. , The researchers produced evidence that stem ... that are a feature of the bowel lining, and ... development, a controversial finding as scientists are still divided ... technologies, Dr Chin Wee Tan and Professor Tony Burgess ...
Breaking Biology News(10 mins):Sperm wars 2Modeling tumor dormancy 2Cryptic clues drive new theory of bowel cancer development 2
... WI, NOVEMBER 9, 2009 -- Agricultural soils accumulate ... of their presence in wastes (sewage biosolids and manures) ... time. Regulations and guidelines for tolerable concentrations of these ... assumption that the toxic effects of the metals are ...
... The drug Sprycel, approved for use by the ... myeloid leukemia, significantly inhibited the growth and invasiveness of ... study by researchers with UCLA,s Jonsson Comprehensive Cancer Center ... regimen, was even more effective in fighting ovarian cancer ...
... and elsewhere provide support for the use of marine ... marine habitats, according to biologists at the University of ... the Gulf of California, for example, confirmed the validity ... offspring produced in a protected area can replenish the ...
Cached Biology News:Additive copper-zinc interaction affects toxic response in soybean 2FDA approved leukemia drugs shows promise in ovarian cancer cells 2Studies show marine reserves can be an effective tool for managing fisheries 2Studies show marine reserves can be an effective tool for managing fisheries 3Studies show marine reserves can be an effective tool for managing fisheries 4Studies show marine reserves can be an effective tool for managing fisheries 5
(Date:10/20/2014)... Oct. 20, 2014 PureTech , a ... big healthcare problems, announced today the closing of ... participation from Invesco Perpetual, a $120 Billion group ... drive PureTech,s existing pipeline forward and to advance ... the scientific creativity to really go for the ...
(Date:10/19/2014)... 20, 2014 OCTOBER 20-22, ... (ABIM). ABIM will take place at ... about ABIM 2014 is now available at ... representing companies and organizations from all over ... information on the latest products and developments ...
(Date:10/19/2014)... 19, 2014 The report "Chocolate, Cocoa ... Trade, Prices, Geography Trend and Forecast (2011 - 2016)," ... and geography and studies the major market drivers, restraints, ... Europe, and Asia. , The global chocolate market is ... billion in 2016 at an estimated CAGR of 2.7% ...
(Date:10/18/2014)... 2014 The Asia-Pacific Bio-based Advanced ... the bio-based advanced phase change material market in ... Browse through the TOC of the Asia-Pacific Bio-based ... an idea of the in-depth analysis provided. This ... the Asia-Pacific bio-based advanced phase change material market, ...
Breaking Biology Technology:PureTech Announces Expansion with Oversubscribed $55M Funding Round 2PureTech Announces Expansion with Oversubscribed $55M Funding Round 3PureTech Announces Expansion with Oversubscribed $55M Funding Round 4PureTech Announces Expansion with Oversubscribed $55M Funding Round 5PureTech Announces Expansion with Oversubscribed $55M Funding Round 6Chocolate Market Projected To Reach $98.3 Billion by 2016 - New Report by MarketsandMarkets 2Chocolate Market Projected To Reach $98.3 Billion by 2016 - New Report by MarketsandMarkets 3Chocolate Market Projected To Reach $98.3 Billion by 2016 - New Report by MarketsandMarkets 4The Asia-Pacific Bio-based Advanced Phase Change Materials Market is estimated to grow to $39.8 million by 2018 - New Report by MicroMarket Monitor 2The Asia-Pacific Bio-based Advanced Phase Change Materials Market is estimated to grow to $39.8 million by 2018 - New Report by MicroMarket Monitor 3The Asia-Pacific Bio-based Advanced Phase Change Materials Market is estimated to grow to $39.8 million by 2018 - New Report by MicroMarket Monitor 4
... , October 1999 , , Molecular ... to detect specific nucleic acids in homogeneous solutions. 1 ... in a hairpin shape because of thecomplementary arms at ... Thestrained loop portion contains the nucleotide that is complementary ...
... , ... INTRODUCTION , Modern assays for ... Enzyme selectivity is obtained by choosing a peptide sequence uniquely ... chromophore or fluorophore is attached near the peptides cleavage site ...
... , , , ... STEPS , , EASY SINGLE-STEP ASSAY ... , , FATTY ACID UPTAKE AND TRANSPORTERS , ... cellular,processes including mitochondria oxidation,membrane synthesis and energy storage.,Pathologically increased intracellular fatty ...
Cached Biology Technology:Measurement of Molecular Beacons in the SpectraMax Gemini Spectrofluorometer (MaxLine Application Note #36) 2Measurement of Molecular Beacons in the SpectraMax Gemini Spectrofluorometer (MaxLine Application Note #36) 3Measurement of Molecular Beacons in the SpectraMax Gemini Spectrofluorometer (MaxLine Application Note #36) 4Fluorometric Protease Assays in the SpectraMax Gemini Microplate Spectrofluorometer: Example Using Caspase3 (MaxLine Application Note #35) 2Fluorometric Protease Assays in the SpectraMax Gemini Microplate Spectrofluorometer: Example Using Caspase3 (MaxLine Application Note #35) 3Fluorometric Protease Assays in the SpectraMax Gemini Microplate Spectrofluorometer: Example Using Caspase3 (MaxLine Application Note #35) 4Fluorometric Protease Assays in the SpectraMax Gemini Microplate Spectrofluorometer: Example Using Caspase3 (MaxLine Application Note #35) 5Fluorometric Protease Assays in the SpectraMax Gemini Microplate Spectrofluorometer: Example Using Caspase3 (MaxLine Application Note #35) 6QBT Fatty Acid Uptake Assay Kit datasheet 2QBT Fatty Acid Uptake Assay Kit datasheet 3
...
DTT 50 l...
...
Chicken polyclonal to YebU ( Abpromise for all tested applications). Antigen: Synthetic peptide, corresponding to amino acids 196-244 of E. coli YebU....
Biology Products: