Evidence map›Paper›PMID 25233851›Full record

ArticleProtein engineering, design & selection : PEDS2014

Nature versus design: the conformational propensities of D-amino acids and the importance of side chain chirality.

Clare-Louise Towse, Gene Hopping, Ivan Vulovic, Valerie Daggett

Open access · bronzeAbstract read
In one paragraph

Article in Protein engineering, design & selection : PEDS, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
2.1field-weighted citation impact, top 14% 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

20 citing papers in PubMed, 38 citations in OpenAlex.

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  11. The Role of α-sheet in Amyloid Oligomer Aggregation and Toxicity.The Yale journal of biology and medicine · 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

4 authors at 1 institution in 1 country.

Clare-Louise TowseDepartment of Bioengineering, University of Washington, Seattle, WA 98195-5013, USA.
Gene HoppingDepartment of Bioengineering, University of Washington, Seattle, WA 98195-5013, USA.
Ivan VulovicDepartment of Bioengineering, University of Washington, Seattle, WA 98195-5013, USA.
Valerie DaggettDepartment of Bioengineering, University of Washington, Seattle, WA 98195-5013, USA daggett@u.washington.edu.
University of Washington · US

Funding

MOLECULAR DYNAMICS SIMULATIONS OF PROTEIN UNFOLDINGR01GM050789 · NIGMS · UNIVERSITY OF WASHINGTON · PI DAGGETT, VALERIE D · 2000 to 2014
$3.9M
Design and characterization of alpha-sheet compounds to target amyloid diseasesR01GM095808 · NIGMS · UNIVERSITY OF WASHINGTON · PI DAGGETT, VALERIE D · 2013 to 2016
$1.2M
MOLECULAR DYNAMICS SIMULATIONS OF PROTEIN UNFOLDINGR29GM050789 · NIGMS · UNIVERSITY OF WASHINGTON · PI DAGGETT, VALERIE D · 1995 to 1999
–
NIGMS NIH HHS GM 50789NIGMS NIH HHS GM 95836NIGMS NIH HHS R01 GM050789NIGMS NIH HHS R01 GM095808NIGMS NIH HHS R29 GM050789
6 · The paper itself

Abstract

D-amino acids are useful building blocks for de novo peptide design and they play a role in aging-related diseases associated with gradual protein racemization. For amino acids with achiral side chains, one should be able to presume that the conformational propensities of L- and D-amino acids are a reflection of one another due to the straightforward geometric inversion at the Cα atom. However, this presumption does not account for the directionality of the backbone dipole and the inverted propensities have never been definitively confirmed in this context. Furthermore, there is little known of how alternative side chain chirality affects the backbone conformations of isoleucine and threonine. Using a GGXGG host-guest pentapeptide system, we have completed exhaustive sampling of the conformational propensities of the D-amino acids, including D-allo-isoleucine and D-allo-threonine, using atomistic molecular dynamics simulations. Comparison of these simulations with the same systems hosting the cognate L-amino acids verifies that the intrinsic backbone conformational propensities of the D-amino acids are the inverse of their cognate L-enantiomers. Where amino acids have a chiral center in their side chain (Thr, Ile) the β-configuration affects the backbone sampling, which in turn can confer different biological properties.

Indexed as

Protein Structure, SecondaryAmino AcidsDatabases, FactualMolecular Dynamics SimulationProteinsStereoisomerismAmino AcidsProteinsconformational samplingd-amino acidsepimerizationMD simulationracemization

Identifiers

PMID25233851
PMCPMC4204638
OpenAlexW2334550978

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.