Evidence map›Paper›PMID 9150213›Full record

ArticleJournal of bacteriology1997

Molecular characterization and cellular localization of TpLRR, a processed leucine-rich repeat protein of Treponema pallidum, the syphilis spirochete.

D V Shevchenko, D R Akins, E Robinson, M Li, T G Popova, D L Cox, J D Radolf

Open access · greenAbstract read
In one paragraph

Article in Journal of bacteriology, 1997. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
1.3field-weighted citation impact, top 19% 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

22 citing papers in PubMed, 30 citations in OpenAlex.

  1. New insights into the putative role of leucine-rich repeat proteins ofFrontiers in cellular and infection microbiology · 2024
    Review
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  4. Structural characterization of Treponema pallidum Tp0225 reveals an unexpected leucine-rich repeat architecture.Acta crystallographica. Section F, Structural biology communications · 2019
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  9. Human leucine-rich repeat proteins: a genome-wide bioinformatic categorization and functional analysis in innate immunity.Proceedings of the National Academy of Sciences of the United States of America · 2011
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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

7 authors at 1 institution in 1 country.

D V ShevchenkoDepartment of Internal Medicine, U.T. Southwestern Medical Center at Dallas, Texas 75235, USA.
D R Akins
E Robinson
M Li
T G Popova
D L Cox
J D Radolf
The University of Texas Southwestern Medical Center · US

Funding

Treponema pallidum Outer Membrane Proteins and Transition Metal AcquisitionR01AI026756 · NIAID · UNIVERSITY OF TEXAS SW MED CTR/DALLAS · PI RADOLF, JUSTIN D · 1992 to 2017
$5.1M
T.pallidum Membrane Immunogens and Anti-Oxidant DefenseR37AI026756 · NIAID · UNIVERSITY OF CONNECTICUT SCH OF MED/DNT · PI RADOLF, JUSTIN D · 2002 to 2006
$1.8M
MEMBRANE PROTEINS OF TREPONEMA PALLIDUMR29AI026756 · NIAID · UNIVERSITY OF TEXAS SW MED CTR/DALLAS · PI RADOLF, JUSTIN D. · 1988 to 1991
–
NIAID NIH HHS AI-26756
6 · The paper itself

Abstract

Automated Edman degradation was used to obtain N-terminal and internal amino acid sequences from a 26-kDa protein in isolated Treponema pallidum outer membranes (OMs). The resulting sequences enabled us to PCR amplify from T. pallidum DNA a 275-bp fragment of the corresponding gene. The complete nucleotide sequence of the gene was determined from fragments amplified by long-distance PCR. Primer extension verified the assigned translational start of the open reading frame (ORF) and putative upstream promoter elements. The ORF encoded a highly basic (pI 9.6) 26-kDa protein which contained an N-terminal 25-amino-acid leader peptide terminated by a signal peptidase I cleavage site. The mature protein contained seven tandemly spaced copies (as well as an eighth incomplete copy) of a leucine-rich repeat (LRR), a motif previously identified in a number of prokaryotic and eukaryotic proteins. Accordingly, the polypeptide was designated T. pallidum leucine-rich repeat protein (TpLRR). Although Triton X-114 phase partitioning showed that TpLRR was hydrophilic, cell localization studies showed that most of the antigen was associated with the peptidoglycan-cytoplasmic membrane complex rather than being freely soluble in the periplasmic space. Immunoblot studies showed that syphilis patients develop a weak antibody response to the antigen. Lastly, the lrr(T. pallidum) gene was mapped to a 60-kb SfiI-SpeI fragment of the T. pallidum chromosome which also contains the rrnA and flaA genes. The function(s) of TpLRR is currently unknown; however, protein-protein and/or protein-lipid interactions mediated by its LRR motifs may facilitate interactions between components of the T. pallidum cell envelope.

Indexed as

Amino Acid SequenceAntibodies, BacterialBacterial Outer Membrane ProteinsBase SequenceCell MembraneChromosome MappingCytoplasmLeucineMolecular Sequence DataPeptidoglycanProtein Structure, SecondaryRepetitive Sequences, Nucleic AcidSyphilisTreponema pallidumAntibodies, BacterialBacterial Outer Membrane ProteinsLeucinePeptidoglycanTpLRR protein, Treponema pallidum

Identifiers

PMID9150213
PMCPMC179096
OpenAlexW2162508783

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.