Evidence map›Paper›PMID 17985934›Full record

ArticleBiochemistry2007

Magic-angle spinning solid-state NMR spectroscopy of nanodisc-embedded human CYP3A4.

Aleksandra Z Kijac, Ying Li, Stephen G Sligar, Chad M Rienstra

Open access · greenAbstract read
In one paragraph

Article in Biochemistry, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 46 papers.

0numbers the graph read from it
0cells of the map it votes in
46citing papers in PubMed
5.1field-weighted citation impact, top 4% 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

46 citing papers in PubMed, 104 citations in OpenAlex.

  1. Article
  2. Review
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  4. Article
  5. Review
  6. Review
  7. Nanodiscs: A toolkit for membrane protein science.Protein science : a publication of the Protein Society · 2021
    Review
  8. Article
  9. Article
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  11. Article
  12. Article
  13. Review
  14. Article
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  17. Article
  18. Membrane protein structure from rotational diffusion.Biochimica et biophysica acta · 2015
    Review
  19. Review
  20. Article
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.

Aleksandra Z KijacCenter for Biophysics and Computational Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 618001, USA.
Ying Li
Stephen G Sligar
Chad M Rienstra
University of Illinois Urbana-Champaign · US

Funding

METALLOENZYME MECHANISMSR01GM033775 · NIGMS · UNIVERSITY OF ILLINOIS URBANA-CHAMPAIGN · PI SLIGAR, STEPHEN G. · 1985 to 2014
$5.2M
HEME PROTEIN REDUCTASESR37GM031756 · NIGMS · UNIVERSITY OF ILLINOIS URBANA-CHAMPAIGN · PI SLIGAR, STEPHEN G. · 1999 to 2008
$3.1M
Integrated Theoretical and Experimental Studies of P450 Structure and FunctionR01GM079530 · NIGMS · UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGN · PI SCHULER, MARY A · 2007 to 2010
$2.1M
HEME PROTEIN REDUCTASESR01GM031756 · NIGMS · UNIVERSITY OF ILLINOIS URBANA-CHAMPAIGN · PI SLIGAR, STEPHEN G. · 1985 to 2012
$1.5M
NIGMS NIH HHS GM31756NIGMS NIH HHS GM33775NIGMS NIH HHS GM79530NIGMS NIH HHS R01 GM031756NIGMS NIH HHS R01 GM033775NIGMS NIH HHS R01 GM079530NIGMS NIH HHS R37 GM031756
6 · The paper itself

Abstract

Cytochrome P450 (CYP) 3A4 contributes to the metabolism of approximately 50% of commercial drugs by oxidizing a large number of structurally diverse substrates. Like other endoplasmic reticulum-localized P450s, CYP3A4 contains a membrane-anchoring N-terminal helix and a significant number of hydrophobic domains, important for the interaction between CYP3A4 and the membrane. Although the membrane affects specificity of CYP3A4 ligand binding, the structural details of the interaction have not been revealed so far because X-ray crystallography studies are available only for the soluble domain of CYP3A4. Here we report sample preparation and initial magic-angle spinning (MAS) solid-state NMR (SSNMR) of CYP3A4 (Delta3-12) embedded in a nanoscale membrane bilayer, or Nanodisc. The growth protocol yields approximately 2.5 mg of the enzymatically active, uniformly 13C,15N-enriched CYP3A4 from 1 L of growth medium. Polyethylene glycol 3350-precipitated CYP3A4 in Nanodiscs yields spectra of high resolution and sensitivity, consistent with a folded, homogeneous protein. CYP3A4 in Nanodiscs remains enzymatically active throughout the precipitation protocol as monitored by bromocriptine binding. The 13C line widths measured from 13C-13C 2D chemical shift correlation spectra are approximately 0.5 ppm. The secondary structure distribution within several amino acid types determined from 13C chemical shifts is consistent with the ligand-free X-ray structures. These results demonstrate that MAS SSNMR can be performed on Nanodisc-embedded membrane proteins in a folded, active state. The combination of SSNMR and Nanodisc methodologies opens up new possibilities for obtaining structural information on CYP3A4 and other integral membrane proteins with full retention of functionality.

Indexed as

Crystallography, X-RayCytochrome P-450 CYP3ACytochrome P-450 Enzyme SystemHumansNanostructuresNuclear Magnetic Resonance, BiomolecularProtein ConformationCYP3A4 protein, humanCytochrome P-450 CYP3ACytochrome P-450 Enzyme System

Identifiers

PMID17985934
PMCPMC2571072
OpenAlexW2062675935

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.