Evidence map›Paper›PMID 22904283›Full record

ArticleJournal of bacteriology2012

The spanin complex is essential for lambda lysis.

Joel Berry, Manoj Rajaure, Ting Pang, Ry Young

Open access · bronzeAbstract read
In one paragraph

Article in Journal of bacteriology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 99 papers.

0numbers the graph read from it
0cells of the map it votes in
99citing papers in PubMed
6.5field-weighted citation impact, top 3% 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

99 citing papers in PubMed, 141 citations in OpenAlex.

  1. LPS in gram-negative bacterial growth and physiology: outside but fully integrated.Microbiology and molecular biology reviews : MMBR · 2026
    Review
  2. Prophage-Derived Molecules as Anti-Antibiotics (Basel, Switzerland) · 2026
    Review
  3. Article
  4. Article
  5. Bacteriophages target membrane-anchored glycopolymers to promote host cell lysis and progeny release.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. A conserved hub protein required for peptidoglycan remodeling and cell division inProceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  11. Review
  12. Review
  13. Review
  14. Article
  15. Article
  16. Article
  17. Review
  18. Identifying components of theJournal of bacteriology · 2024
    Article
  19. Review
  20. Article

39 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

4 authors at 1 institution in 1 country.

Joel BerryCenter for Phage Technology, Department of Biochemistry and Biophysics, Texas A&M University, College Station, Texas, USA.
Manoj Rajaure
Ting Pang
Ry Young
Texas A&M University · US

Funding

CONTROL OF VIRUS-INDUCED LYSISR01GM027099 · NIGMS · TEXAS A&M UNIVERSITY HEALTH SCIENCE CTR · PI YOUNG, RYLAND FLETCHER · 1985 to 2019
$4.6M
CONTROL OF VIRUS INDUCED LYSISR37GM027099 · NIGMS · TEXAS A&M UNIVERSITY SYSTEM · PI YOUNG, RYLAND F. · 1996 to 2005
$2.4M
NIGMS NIH HHS GM27099NIGMS NIH HHS R01 GM027099NIGMS NIH HHS R37 GM027099
6 · The paper itself

Abstract

Phage lysis is a ubiquitous biological process, the most frequent cytocidal event in the biosphere. Lysis of Gram-negative hosts has been shown to require holins and endolysins, which attack the cytoplasmic membrane and peptidoglycan, respectively. Recently, a third class of lysis proteins, the spanins, was identified. The first spanins to be characterized were λ Rz and Rz1, an integral cytoplasmic membrane protein and an outer membrane lipoprotein, respectively. Previous work has shown that Rz and Rz1 form complexes that span the entire periplasm. Phase-contrast video microscopy was used to record the morphological changes involved in the lysis of induced λ lysogens carrying prophages with either the λ canonical holin-endolysin system or the phage 21 pinholin-signal anchor release (SAR) endolysin system. In the former, rod morphology persisted until the instant of an explosive polar rupture, immediately emptying the cell of its contents. In contrast, in pinholin-SAR endolysin lysis, the cell began to shorten and thicken uniformly, with the resultant rounded cell finally bursting. In both cases, lysis failed to occur in inductions of isogenic prophages carrying null mutations in the spanin genes. In both systems, instead of an envelope rupture, the induced cells were converted from a rod shape to a spherical form. A functional GFPΦRz chimera was shown to exhibit a punctate distribution when coexpressed with Rz1, despite the absence of endolysin function. A model is proposed in which the spanins carry out the essential step of disrupting the outer membrane, in a manner regulated by the state of the peptidoglycan layer.

Indexed as

BacteriolysisBacteriophage lambdaEndopeptidasesGene DeletionLysogenyMicroscopy, Phase-ContrastMicroscopy, VideoModels, BiologicalViral ProteinsendolysinEndopeptidasesRz protein, bacteriophage lambdaViral Proteins

Identifiers

PMID22904283
PMCPMC3458670
OpenAlexW2134618778

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.