Evidence map›Paper›PMID 12221284›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2002

Convergent evolution sheds light on the anti-beta -elimination mechanism common to family 1 and 10 polysaccharide lyases.

Simon J Charnock, Ian E Brown, Johan P Turkenburg, Gary W Black, Gideon J Davies

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed
8.7field-weighted citation impact, top 3% of its field
1 · What the graph read from it

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.

2 · The registry

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.

3 · Its place in the literature

Who cites it

30 citing papers in PubMed, 108 citations in OpenAlex.

  1. Crystal structure ofProceedings of the National Academy of Sciences of the United States of America · 2026
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  4. Bacterial polysaccharide lyase family 33: Specificity from an evolutionarily conserved binding tunnel.Proceedings of the National Academy of Sciences of the United States of America · 2025
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  12. Periplasmic depolymerase provides insight into ABC transporter-dependent secretion of bacterial capsular polysaccharides.Proceedings of the National Academy of Sciences of the United States of America · 2018
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 2 institutions in 1 country.

Simon J CharnockYork Structural Biology Laboratory, Department of Chemistry, University of York, Heslington, York YO10 5YW, United Kingdom.
Ian E Brown
Johan P Turkenburg
Gary W Black
Gideon J Davies
University of York · GBNorthumbria University · GB

Funding

Wellcome Trust
6 · The paper itself

Abstract

Enzyme-catalyzed beta-elimination of sugar uronic acids, exemplified by the degradation of plant cell wall pectins, plays an important role in a wide spectrum of biological processes ranging from the recycling of plant biomass through to pathogen virulence. The three-dimensional crystal structure of the catalytic module of a "family PL-10" polysaccharide lyase, Pel10Acm from Cellvibrio japonicus, solved at a resolution of 1.3 A, reveals a new polysaccharide lyase fold and is the first example of a polygalacturonic acid lyase that does not exhibit the "parallel beta-helix" topology. The "Michaelis" complex of an inactive mutant in association with the substrate trigalacturonate/Ca2+ reveals the catalytic machinery harnessed by this polygalacturonate lyase, which displays a stunning resemblance, presumably through convergent evolution, to the tetragalacturonic acid complex observed for a structurally unrelated polygalacturonate lyase from family PL-1. Common coordination of the -1 and +1 subsite saccharide carboxylate groups by a protein-liganded Ca2+ ion, the positioning of an arginine catalytic base in close proximity to the alpha-carbon hydrogen and numerous other conserved enzyme-substrate interactions, considered in light of mutagenesis data for both families, suggest a generic polysaccharide anti-beta-elimination mechanism.

Indexed as

Catalytic DomainCellvibrioCrystallography, X-RayEvolution, MolecularKineticsModels, MolecularMutagenesis, Site-DirectedPolysaccharide-LyasesProtein ConformationProtein FoldingProtein Structure, SecondaryRecombinant ProteinsStatic ElectricitySubstrate SpecificitySugar AcidsTrisaccharidesO-galactopyranosyluronic acid-(1-4)-O-galactopyranosyluronic acid-(1-4)-galactopyranosyluronic acidPolysaccharide-LyasesRecombinant ProteinsSugar AcidsTrisaccharides

Identifiers

PMID12221284
PMCPMC129399
OpenAlexW2021863343

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.