Evidence map›Paper›PMID 17128992›Full record

ArticleBiochemistry2006

The N-terminal domain of Bcl-xL reversibly binds membranes in a pH-dependent manner.

Guruvasuthevan R Thuduppathy, Oihana Terrones, Jeffrey W Craig, Gorka Basañez, R Blake Hill

Open access · greenAbstract read
In one paragraph

Article in Biochemistry, 2006. 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
2.2field-weighted citation impact, top 13% 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, 36 citations in OpenAlex.

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  12. Membrane promotes tBID interaction with BCL(XL).Nature structural & molecular biology · 2009
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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 2 countries.

Guruvasuthevan R ThuduppathyDepartment of Biology, Johns Hopkins University, Baltimore, Maryland 21218, USA.
Oihana Terrones
Jeffrey W Craig
Gorka Basañez
R Blake Hill
University of the Basque Country · ESJohns Hopkins University · US

Funding

Structural Biology of Mitochondrial FissionR01GM067180 · NIGMS · MEDICAL COLLEGE OF WISCONSIN · PI HILL, R BLAKE · 2004 to 2022
$6.0M
600 MHZ NMR SPECTROMETER FOR SHARED USE: MOLECULAR BIOLOGYS10RR020922 · NCRR · JOHNS HOPKINS UNIVERSITY · PI HILL, R BLAKE · 2005 to 2005
$500k
NCRR NIH HHS S10 RR020922NCRR NIH HHS S10-RR020922NIGMS NIH HHS R01 GM067180NIGMS NIH HHS R01GM067180
6 · The paper itself

Abstract

Bcl-xL regulates apoptosis by maintaining the integrity of the mitochondrial outer membrane by adopting both soluble and membrane-associated forms. The membrane-associated conformation does not require a conserved, C-terminal transmembrane domain and appears to be inserted into the bilayer of synthetic membranes as assessed by membrane permeabilization and critical surface pressure measurements. Membrane association is reversible and is regulated by the cooperative binding of approximately two protons to the protein. Two acidic residues, Glu153 and Asp156, that lie in a conserved hairpin of Bcl-xLDeltaTM appear to be important in this process on the basis of a 16% increase in the level of membrane association of the double mutant E153Q/D156N. Contrary to that for the wild type, membrane permeabilization for the mutant is not correlated with membrane association. Monolayer surface pressure measurements suggest that this effect is primarily due to less membrane penetration. These results suggest that E153 and D156 are important for the Bcl-xLDeltaTM conformational change and that membrane binding can be distinct from membrane permeabilization. Taken together, these studies support a model in which Bcl-xL activity is controlled by reversible insertion of its N-terminal domain into the mitochondrial outer membrane. Future studies with Bcl-xL mutants such as E153Q/D156N should allow determination of the relative contributions of membrane binding, insertion, and permeabilization to the regulation of apoptosis.

Indexed as

Amino Acid Sequencebcl-X ProteinCell MembraneCell Membrane PermeabilityConserved SequenceHydrogen-Ion ConcentrationHydrophobic and Hydrophilic InteractionsModels, MolecularMolecular Sequence DataMutationPressureProtein BindingProtein Structure, TertiarySolutionsbcl-X ProteinSolutions

Identifiers

PMID17128992
PMCPMC1764622
OpenAlexW2055486660

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.