Evidence map›Paper›PMID 26958837›Full record

ArticleNature2016

Observing cellulose biosynthesis and membrane translocation in crystallo.

Jacob L W Morgan, Joshua T McNamara, Michael Fischer, Jamie Rich, Hong-Ming Chen, Stephen G Withers, Jochen Zimmer

Open access · greenAbstract read
In one paragraph

Article in Nature, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 79 papers.

0numbers the graph read from it
0cells of the map it votes in
79citing papers in PubMed
10.0field-weighted citation impact, top 1% 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

79 citing papers in PubMed, 167 citations in OpenAlex.

  1. Review
  2. Article
  3. Article
  4. Article
  5. Article
  6. Fungal Chitin Synthases: Structure, Function, and Regulation.Journal of fungi (Basel, Switzerland) · 2025
    Review
  7. Article
  8. Article
  9. Article
  10. Structural glycobiology - from enzymes to organelles.Biochemical Society transactions · 2025
    Review
  11. Review
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Review
  18. Article
  19. Article
  20. Article

19 more citing papers are in PubMed but not listed here.

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

7 authors at 2 institutions in 2 countries.

Jacob L W MorganUniversity of Virginia School of Medicine, Center for Membrane Biology, Molecular Physiology and Biological Physics, 480 Ray C. Hunt Drive, Charlottesville, Virginia 22908, USA.
Joshua T McNamaraUniversity of Virginia School of Medicine, Center for Membrane Biology, Molecular Physiology and Biological Physics, 480 Ray C. Hunt Drive, Charlottesville, Virginia 22908, USA.
Michael FischerDepartment of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.
Jamie RichDepartment of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.
Hong-Ming ChenDepartment of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.
Stephen G WithersDepartment of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.
Jochen ZimmerUniversity of Virginia School of Medicine, Center for Membrane Biology, Molecular Physiology and Biological Physics, 480 Ray C. Hunt Drive, Charlottesville, Virginia 22908, USA.
University of British Columbia · CAUniversity of Virginia · US

Funding

Overall EvaluationP41GM103403 · NIGMS · CORNELL UNIVERSITY · PI EALICK, STEVEN E · 2012 to 2017
$14.3M
Mechanism of Cellulose Synthesis and Transport Across Biological MembranesR01GM101001 · NIGMS · UNIVERSITY OF VIRGINIA · PI ZIMMER, JOCHEN · 2012 to 2021
$3.7M
Pixel Array Detector for X-ray CrystallographyS10RR029205 · NCRR · CORNELL UNIVERSITY · PI EALICK, STEVEN E · 2010 to 2010
$1.8M
NCRR NIH HHS S10 RR029205NIGMS NIH HHS 1R01GM101001NIGMS NIH HHS P41 GM103403NIGMS NIH HHS R01 GM101001
6 · The paper itself

Abstract

Many biopolymers, including polysaccharides, must be translocated across at least one membrane to reach their site of biological function. Cellulose is a linear glucose polymer synthesized and secreted by a membrane-integrated cellulose synthase. Here, in crystallo enzymology with the catalytically active bacterial cellulose synthase BcsA-BcsB complex reveals structural snapshots of a complete cellulose biosynthesis cycle, from substrate binding to polymer translocation. Substrate- and product-bound structures of BcsA provide the basis for substrate recognition and demonstrate the stepwise elongation of cellulose. Furthermore, the structural snapshots show that BcsA translocates cellulose via a ratcheting mechanism involving a 'finger helix' that contacts the polymer's terminal glucose. Cooperating with BcsA's gating loop, the finger helix moves 'up' and 'down' in response to substrate binding and polymer elongation, respectively, thereby pushing the elongated polymer into BcsA's transmembrane channel. This mechanism is validated experimentally by tethering BcsA's finger helix, which inhibits polymer translocation but not elongation.

Indexed as

CelluloseCrystallography, X-RayGlucoseGlucosyltransferasesIntracellular MembranesModels, MolecularMovementProtein Structure, SecondaryProteolipidsRhodobacter sphaeroidesSubstrate SpecificityCellulosecellulose synthaseGlucoseGlucosyltransferasesProteolipidsproteoliposomes

Identifiers

PMID26958837
PMCPMC4843519
OpenAlexW2293812683

What Socratic holds

Textmetadata
LicenceTDM
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 Socratic graph.