ArticleBiochemistry2008
Interaction of group IA phospholipase A2 with metal ions and phospholipid vesicles probed with deuterium exchange mass spectrometry.
Article in Biochemistry, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 39 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
39 citing papers in PubMed.
- Use of hydrogen deuterium exchange mass spectrometry in tandem with modern structural biology.The Biochemical journal · 2026Review
- Lipoprotein-associated phospholipase A2 (Lp-PLA2): a key hub linking lipid metabolism and immune inflammation.Frontiers in immunology · 2026Review
- Article
- Chromatographic Phospholipid Trapping for Automated H/D Exchange Mass Spectrometry of Membrane Protein-Lipid Assemblies.Analytical chemistry · 2023Article
- The Phospholipase A2 Superfamily: Structure, Isozymes, Catalysis, Physiologic and Pathologic Roles.International journal of molecular sciences · 2023Review
- Regulatory mechanisms triggered by enzyme interactions with lipid membrane surfaces.Frontiers in molecular biosciences · 2023Review
- Membrane Association Allosterically Regulates Phospholipase AAccounts of chemical research · 2022Article
- Allosteric regulation by membranes and hydrophobic subsites in phospholipase AThe Journal of biological chemistry · 2022Review
- Advances in Hydrogen/Deuterium Exchange Mass Spectrometry and the Pursuit of Challenging Biological Systems.Chemical reviews · 2022Review
- Unraveling cardiolipin-induced conformational change of cytochrome c through H/D exchange mass spectrometry and quartz crystal microbalance.Scientific reports · 2021Article
- Probing Protein-Membrane Interactions and Dynamics Using Hydrogen-Deuterium Exchange Mass Spectrometry (HDX-MS).Methods in molecular biology (Clifton, N.J.) · 2021Article
- Phospholipase ABiochimica et biophysica acta. Molecular and cell biology of lipids · 2019Review
- Dynamic structural biology at the protein membrane interface.The Journal of biological chemistry · 2019Review
- Tracking Higher Order Protein Structure by Hydrogen-Deuterium Exchange Mass Spectrometry.Protein and peptide letters · 2019Review
- Review of four major distinct types of human phospholipase AAdvances in biological regulation · 2018Review
- Review
- Molecular mechanism of activation of class IA phosphoinositide 3-kinases (PI3Ks) by membrane-localized HRas.The Journal of biological chemistry · 2017Article
- Analyses of Calcium-Independent Phospholipase AMethods in enzymology · 2017Article
- Liberating Chiral Lipid Mediators, Inflammatory Enzymes, and LIPID MAPS from Biological Grease.The Journal of biological chemistry · 2016Review
- Enhancing the quality of H/D exchange measurements with mass spectrometry detection in disulfide-rich proteins using electron capture dissociation.Analytical chemistry · 2014Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
Abstract
Deuterium exchange mass spectrometric evaluation of the cobra venom (Naja naja naja) group IA phospholipase A 2 (GIA PLA 2) was carried out in the presence of metal ions Ca (2+) and Ba (2+) and phospholipid vesicles. Novel conditions for digesting highly disulfide bonded proteins and a methodology for studying protein-lipid interactions using deuterium exchange have been developed. The enzyme exhibits unexpectedly slow rates of exchange in the two large alpha-helices of residues 43-53 and 89-101, which suggests that these alpha-helices are highly rigidified by the four disulfide bonds in this region. The binding of Ca (2+) or Ba (2+) ions decreased the deuterium exchange rates for five regions of the protein (residues 24-27, 29-40, 43-53, 103-110, and 111-114). The magnitude of the changes was the same for both ions with the exception of regions of residues 24-27 and 103-110 which showed greater changes for Ca (2+). The crystal structure of the N. naja naja GIA PLA 2 contains a single Ca (2+) bound in the catalytic site, but the crystal structures of related PLA 2s contain a second Ca (2+) binding site. The deuterium exchange studies reported here clearly show that in solution the GIA PLA 2 does in fact bind two Ca (2+) ions. With dimyristoylphosphatidylcholine (DMPC) phospholipid vesicles with 100 microM Ca (2+) present at 0 degrees C, significant areas on the i-face of the enzyme showed decreases in the rate of exchange. These areas included regions of residues 3-8, 18-21, and 56-64 which include Tyr-3, Trp-61, Tyr-63, and Phe-64 proposed to penetrate the membrane surface. These regions also contained Phe-5 and Trp-19, proposed to bind the fatty acyl tails of substrate.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.