Evidence map›Paper›PMID 19801540›Full record

ArticleThe Journal of biological chemistry2009

Structural analysis of semi-specific oligosaccharide recognition by a cellulose-binding protein of thermotoga maritima reveals adaptations for functional diversification of the oligopeptide periplasmic binding protein fold.

Matthew J Cuneo, Lorena S Beese, Homme W Hellinga

Open access · hybridAbstract read
In one paragraph

Article in The Journal of biological chemistry, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
0.6field-weighted citation impact, top 31% 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

15 citing papers in PubMed, 30 citations in OpenAlex.

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  14. Protein conformational switches: from nature to design.Chemistry (Weinheim an der Bergstrasse, Germany) · 2012
    Review
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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

3 authors at 2 institutions in 1 country.

Matthew J CuneoDepartment of Biochemistry, Duke University Medical Center, Durham, North Carolina 27710, USA.
Lorena S Beese
Homme W Hellinga
Duke University · USDuke University Hospital · US

Funding

NIH Director's Pioneer Award (RMI)DP1OD000122 · OD · DUKE UNIVERSITY · PI HELLINGA, HOMME W. · 2004 to 2008
$3.8M
NIH HHS 5 DP1 OD000122-02NIH HHS DP1 OD000122
6 · The paper itself

Abstract

Periplasmic binding proteins (PBPs) constitute a protein superfamily that binds a wide variety of ligands. In prokaryotes, PBPs function as receptors for ATP-binding cassette or tripartite ATP-independent transporters and chemotaxis systems. In many instances, PBPs bind their cognate ligands with exquisite specificity, distinguishing, for example, between sugar epimers or structurally similar anions. By contrast, oligopeptide-binding proteins bind their ligands through interactions with the peptide backbone but do not distinguish between different side chains. The extremophile Thermotoga maritima possesses a remarkable array of carbohydrate-processing metabolic systems, including the hydrolysis of cellulosic polymers. Here, we present the crystal structure of a T. maritima cellobiose-binding protein (tm0031) that is homologous to oligopeptide-binding proteins. T. maritima cellobiose-binding protein binds a variety of lengths of beta(1-->4)-linked glucose oligomers, ranging from two rings (cellobiose) to five (cellopentaose). The structure reveals that binding is semi-specific. The disaccharide at the nonreducing end binds specifically; the other rings are located in a large solvent-filled groove, where the reducing end makes several contacts with the protein, thereby imposing an upper limit of the oligosaccharides that are recognized. Semi-specific recognition, in which a molecular class rather than individual species is selected, provides an efficient solution for the uptake of complex mixtures.

Indexed as

Bacterial ProteinsCarrier ProteinsCellobioseCelluloseCrystallography, X-RayHydrogen BondingModels, MolecularOligopeptidesOligosaccharidesPeriplasmic Binding ProteinsProtein ConformationProtein DenaturationProtein FoldingProtein Structure, TertiaryTemperatureThermotoga maritimaBacterial ProteinsCarrier ProteinsCellobioseCellulosemaltopentaoseOligopeptidesOligosaccharidesPeriplasmic Binding Proteins

Identifiers

PMID19801540
PMCPMC2785164
OpenAlexW2073489889

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.