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List of works by Leiv Sigve Håvarstein

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An unmodified heptadecapeptide pheromone induces competence for genetic transformation in Streptococcus pneumoniae

scientific article published on 21 November 1995
Biosynthesis of bacteriocins in lactic acid bacteria

scientific article published on October 1996
A family of bacteriocin ABC transporters carry out proteolytic processing of their substrates concomitant with export

scientific article published on 01 April 1995
Regulation of competence for genetic transformation in Streptococcus pneumoniae by an auto-induced peptide pheromone and a two-component regulatory system

scientific article published on 01 August 1996
Natural genetic transformation: prevalence, mechanisms and function

scientific article
Competence for genetic transformation in encapsulated strains of Streptococcus pneumoniae: two allelic variants of the peptide pheromone

scientific article published on 01 October 1996
Identification of the streptococcal competence-pheromone receptor

scientific article published in August 1996
Natural competence in the genus Streptococcus: evidence that streptococci can change pherotype by interspecies recombinational exchanges

scientific article published on November 1, 1997
Evolution of Streptococcus pneumoniae and its close commensal relatives.

scientific article
Biochemical and genetic characterization of enterocin P, a novel sec-dependent bacteriocin from Enterococcus faecium P13 with a broad antimicrobial spectrum

scientific article published on November 1, 1997
Biochemical and genetic characterization of enterocin A from Enterococcus faecium, a new antilisterial bacteriocin in the pediocin family of bacteriocins

scientific article published in May 1996
Characterization of the locus responsible for the bacteriocin production in Lactobacillus plantarum C11

scientific article published on 01 August 1996
Production of class II bacteriocins by lactic acid bacteria; an example of biological warfare and communication

scientific article
A novel lactococcal bacteriocin whose activity depends on the complementary action of two peptides

scientific article published on September 1, 1992
Induction of natural competence in Streptococcus pneumoniae triggers lysis and DNA release from a subfraction of the cell population

scientific article
Cannibalism and fratricide: mechanisms and raisons d'être

scientific article published on March 2007
Biochemical and genetic evidence that Enterococcus faecium L50 produces enterocins L50A and L50B, the sec-dependent enterocin P, and a novel bacteriocin secreted without an N-terminal extension termed enterocin Q.

scientific article
The leader peptide of colicin V shares consensus sequences with leader peptides that are common among peptide bacteriocins produced by gram-positive bacteria

scientific article published in September 1994
Regulation of natural genetic transformation and acquisition of transforming DNA in Streptococcus pneumoniae

scientific article published on May 2009
New insights into the pneumococcal fratricide: relationship to clumping and identification of a novel immunity factor

scientific article published in February 2006
Extracellular-peptide control of competence for genetic transformation in Streptococcus pneumoniae

scientific article
Identification of DNA binding sites for ComE, a key regulator of natural competence in Streptococcus pneumoniae

scientific article published on 01 August 1999
Competence-induced fratricide in streptococci

scientific article published on June 2007
Enterocins L50A and L50B, two novel bacteriocins from Enterococcus faecium L50, are related to staphylococcal hemolysins

scientific article published on 01 April 1998
Choline-binding protein D (CbpD) in Streptococcus pneumoniae is essential for competence-induced cell lysis

scientific article published on July 2005
Fratricide in Streptococcus pneumoniae: contributions and role of the cell wall hydrolases CbpD, LytA and LytC.

scientific article published on 23 April 2009
A predatory mechanism dramatically increases the efficiency of lateral gene transfer in Streptococcus pneumoniae and related commensal species

scientific article
Attachment of capsular polysaccharide to the cell wall in Streptococcus pneumoniae

scientific article
Competence-induced cells of Streptococcus pneumoniae lyse competence-deficient cells of the same strain during cocultivation

scientific article published on December 2003
The gene encoding plantaricin A, a bacteriocin from Lactobacillus plantarum C11, is located on the same transcription unit as an agr-like regulatory system.

scientific article published on 01 January 1994
Effects of low PBP2b levels on cell morphology and peptidoglycan composition in Streptococcus pneumoniae R6.

scientific article published on 19 July 2013
Fratricide is essential for efficient gene transfer between pneumococci in biofilms

scientific article
Pneumococcal CbpD is a murein hydrolase that requires a dual cell envelope binding specificity to kill target cells during fratricide

scientific article published on 25 March 2010
Natural genetic transformation: A novel tool for efficient genetic engineering of the dairy bacterium Streptococcus thermophilus

scientific article published on October 2006
Structural basis of PcsB-mediated cell separation in Streptococcus pneumoniae

scientific article
The pneumococcal cell envelope stress-sensing system LiaFSR is activated by murein hydrolases and lipid II-interacting antibiotics.

scientific article published on 29 January 2010
Natural transformation and genome evolution in Streptococcus pneumoniae

scientific article
Sequence of the large double-stranded RNA segment of the N1 strain of infectious pancreatic necrosis virus: a comparison with other Birnaviridae

scientific article published on February 1990
Increasing competence in the genus Streptococcus

scientific article published on 01 November 2010
A hydrophobic patch in the competence-stimulating Peptide, a pneumococcal competence pheromone, is essential for specificity and biological activity

scientific article published in March 2006
BOX elements modulate gene expression in Streptococcus pneumoniae: impact on the fine-tuning of competence development

scientific article
Association of the lactococcin A immunity factor with the cell membrane: purification and characterization of the immunity factor

scientific article published on 01 July 1993
Two separate quorum-sensing systems upregulate transcription of the same ABC transporter in Streptococcus pneumoniae

scientific article published on May 2004
Pneumococcal LytR, a protein from the LytR-CpsA-Psr family, is essential for normal septum formation in Streptococcus pneumoniae

scientific article published on 6 July 2009
Properties and biological role of streptococcal fratricins

scientific article published on 09 March 2012
LytF, a novel competence-regulated murein hydrolase in the genus Streptococcus

scientific article published on 28 November 2011
Characterization of a new serotype of infectious pancreatic necrosis virus isolated from Atlantic salmon

scientific article published on 01 January 1988
Mapping of neutralization epitopes on infectious pancreatic necrosis viruses

scientific article published on 01 May 1995
Peptide-regulated gene depletion system developed for use in Streptococcus pneumoniae

scientific article published on 29 July 2011
Purification and partial characterization of an IgM-like serum immunoglobulin from Atlantic salmon (Salmo salar).

scientific article published in January 1988

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