Username

Password

Forgot Password?

Preview

Sign-in free and Explore the Exciting World of BiomedExperts:

Over 1.500.000 Profiles
More than 1.800 Organizations worldwide
State of the Art Network Visualizations

Manage your own Profile
Locate Experts in your Country/Region
Locate Experts in your 1. and 2. Level Network
Connect to Experts Worldwide

NetworkView

Stephen Farrand

This is a preview profile on BiomedExperts - the first literature-based scientific social network. It brings the right researchers together and allows them to collaborate online. Collexis and Dell provide the BiomedExperts network of +1.5 Million pre-calculated profiles free of charge to researchers worldwide.

Research Profile (preview)

Living Beings

Chemicals & Drugs

Physiology

Genes & Molecular Sequences

Concepts & Ideas

Molecular Sequence Data

Disorders

Plant Tumors

Procedures

Sign-in to see full Profile

Network (preview)

Co-Publications
Name
10
Luo, Zhao-Qing
8
Oger, Phil
8
Hwang, I
7
Piper, KR
7
Qin, Yinping
7
Dessaux, Yves
6
Li, PL
5
Khan, Sharik
5
Su, Shengchang
4
Smyth, Audra
3
Baek, Chang-Ho
3
Gao, Ping
3
Cha, C
3
Kim, Kun-Soo
2
Lee, Ko-Eun

Sign-in to see all Coauthors

Publications

TOP 3
Qin Yinping; Keenan Carrie; Farrand Stephen K
N- and C-terminal regions of the quorum-sensing activator TraR cooperate in interactions with the alpha and sigma-70 components of RNA polymerase.
Penyalver Ramón; Oger Phil M; Su Shengchang; Alvarez Belén; Salcedo Carmina I; López María M; Farrand Stephen K
The S-adenosyl-L-homocysteine hydrolase gene ahcY of Agrobacterium radiobacter K84 is required for optimal growth, antibiotic production, and biocontrol of crown gall disease.
Khan Sharik R; Farrand Stephen K
The BlcC (AttM) lactonase of Agrobacterium tumefaciens does not quench the quorum-sensing system that regulates Ti plasmid conjugative transfer.

Sign-in to see all Publications

Sign in free and see...

Visualized networks:

See your personal network in
sophisticated graphical views

GeoTargeted Searches:

Locate experts around the world
and connect with global collaborators

Research Profiles:

See the visualized research activity
of experts around the globe

Sign-in to see more

Geonetwork of Stephen Farrand (preview)

Cities where this author has publications
Cities where co-authors of this author have publications

Flash Player Required

Sign-in to see more

All Publications

2009: Qin Yinping; Keenan Carrie; Farrand Stephen K
N- and C-terminal regions of the quorum-sensing activator TraR cooperate in interactions with the alpha and sigma-70 components of RNA polymerase.
Molecular microbiology 2009;74(2):330-46.
2009: Penyalver Ramón; Oger Phil M; Su Shengchang; Alvarez Belén; Salcedo Carmina I; López María M; Farrand Stephen K
The S-adenosyl-L-homocysteine hydrolase gene ahcY of Agrobacterium radiobacter K84 is required for optimal growth, antibiotic production, and biocontrol of crown gall disease.
Molecular plant-microbe interactions : MPMI 2009;22(6):713-24.
2009: Khan Sharik R; Farrand Stephen K
The BlcC (AttM) lactonase of Agrobacterium tumefaciens does not quench the quorum-sensing system that regulates Ti plasmid conjugative transfer.
Journal of bacteriology 2009;191(4):1320-9.
2008: Khan Sharik R; Gaines Jennifer; Roop R Martin; Farrand Stephen K
Broad-host-range expression vectors with tightly regulated promoters and their use to examine the influence of TraR and TraM expression on Ti plasmid quorum sensing.
Applied and environmental microbiology 2008;74(16):5053-62.
2008: Su Shengchang; Khan Sharik R; Farrand Stephen K
Induction and loss of Ti plasmid conjugative competence in response to the acyl-homoserine lactone quorum-sensing signal.
Journal of bacteriology 2008;190(13):4398-407.
2008: Kim H Stanley; Yi Hyojeong; Myung Jaehee; Piper Kevin R; Farrand Stephen K
Opine-based Agrobacterium competitiveness: dual expression control of the agrocinopine catabolism (acc) operon by agrocinopines and phosphate levels.
Journal of bacteriology 2008;190(10):3700-11.
2007: Saenkham Panatda; Eiamphungporn Warawan; Farrand Stephen K; Vattanaviboon Paiboon; Mongkolsuk Skorn
Multiple superoxide dismutases in Agrobacterium tumefaciens: functional analysis, gene regulation, and influence on tumorigenesis.
Journal of bacteriology 2007;189(24):8807-17.
2007: Khan Sharik R; Herman Jake; Krank Jessica; Serkova Natalie J; Churchill Mair E A; Suga Hiroaki; Farrand Stephen K
N-(3-hydroxyhexanoyl)-l-homoserine lactone is the biologically relevant quormone that regulates the phz operon of Pseudomonas chlororaphis strain 30-84.
Applied and environmental microbiology 2007;73(22):7443-55.
2007: Qin Yinping; Su Shengchang; Farrand Stephen K
Molecular basis of transcriptional antiactivation. TraM disrupts the TraR-DNA complex through stepwise interactions.
The Journal of biological chemistry 2007;282(27):19979-91.
2006: Kim Jung-Gun; Park Byoung Keun; Kim Sung-Uk; Choi Doil; Nahm Baek Hie; Moon Jae Sun; Reader John S; Farrand Stephen K; Hwang Ingyu
Bases of biocontrol: sequence predicts synthesis and mode of action of agrocin 84, the Trojan horse antibiotic that controls crown gall.
Proceedings of the National Academy of Sciences of the United States of America 2006;103(23):8846-51.
2006: Su Shengchang; Stephens Bonnie B; Alexandre Gladys; Farrand Stephen K
Lon protease of the alpha-proteobacterium Agrobacterium tumefaciens is required for normal growth, cellular morphology and full virulence.
Microbiology (Reading, England) 2006;152(Pt 4):1197-207.
2005: Khan Sharik R; Mavrodi Dmitri V; Jog Geetanjali J; Suga Hiroaki; Thomashow Linda S; Farrand Stephen K
Activation of the phz operon of Pseudomonas fluorescens 2-79 requires the LuxR homolog PhzR, N-(3-OH-Hexanoyl)-L-homoserine lactone produced by the LuxI homolog PhzI, and a cis-acting phz box.
Journal of bacteriology 2005;187(18):6517-27.
2005: Reader John S; Ordoukhanian Phillip T; Kim Jung-Gun; de Crécy-Lagard Valerie; Hwang Ingyu; Farrand Stephen; Schimmel Paul
Major biocontrol of plant tumors targets tRNA synthetase.
Science (New York, N.Y.) 2005;309(5740):1533.
2005: Baek Chang-Ho; Farrand Stephen K; Park Dae-Kyun; Lee Ko-Eun; Hwang Won; Kim Kun-Soo
Genes for utilization of deoxyfructosyl glutamine (DFG), an amadori compound, are widely dispersed in the family Rhizobiaceae.
FEMS microbiology ecology 2005;53(2):221-33.
2004: Qin Yinping; Smyth Audra J; Su Shengchang; Farrand Stephen K
Dimerization properties of TraM, the antiactivator that modulates TraR-mediated quorum-dependent expression of the Ti plasmid tra genes.
Molecular microbiology 2004;53(5):1471-85.
2004: Qin Yinping; Luo Zhao-Qing; Farrand Stephen K
Domains formed within the N-terminal region of the quorum-sensing activator TraR are required for transcriptional activation and direct interaction with RpoA from agrobacterium.
The Journal of biological chemistry 2004;279(39):40844-51.
2004: Teyssier-Cuvelle S; Oger P; Mougel C; Groud K; Farrand S K; Nesme X
A highly selectable and highly transferable Ti plasmid to study conjugal host range and Ti plasmid dissemination in complex ecosystems.
Microbial ecology 2004;48(1):10-8.
2004: Ko Tae-Seok; Lee Sangman; Farrand Stephen K; Korban Schuyler S
A partially disarmed vir helper plasmid, pKYRT1, in conjunction with 2,4-dichlorophenoxyactic acid promotes emergence of regenerable transgenic somatic embryos from immature cotyledons of soybean.
Planta 2004;218(4):536-41.
2003: Luo Zhao-Qing; Su Shengchang; Farrand Stephen K
In situ activation of the quorum-sensing transcription factor TraR by cognate and noncognate acyl-homoserine lactone ligands: kinetics and consequences.
Journal of bacteriology 2003;185(19):5665-72.
2003: Farrand Stephen K; Van Berkum Peter B; Oger Philippe
Agrobacterium is a definable genus of the family Rhizobiaceae.
International journal of systematic and evolutionary microbiology 2003;53(Pt 5):1681-7.
2003: Luo Zhao-Qing; Smyth Audra J; Gao Ping; Qin Yinping; Farrand Stephen K
Mutational analysis of TraR. Correlating function with molecular structure of a quorum-sensing transcriptional activator.
The Journal of biological chemistry 2003;278(15):13173-82.
2003: Baek Chang-Ho; Farrand Stephen K; Lee Ko-Eun; Park Dae-Kyun; Lee Jeong Kug; Kim Kun-Soo
Convergent evolution of Amadori opine catabolic systems in plasmids of Agrobacterium tumefaciens.
Journal of bacteriology 2003;185(2):513-24.
2002: Oger Philippe; Farrand Stephen K
Two opines control conjugal transfer of an Agrobacterium plasmid by regulating expression of separate copies of the quorum-sensing activator gene traR.
Journal of bacteriology 2002;184(4):1121-31.
2002: Farrand Stephen K; Qin Yinping; Oger Philippe
Quorum-sensing system of Agrobacterium plasmids: analysis and utility.
Methods in enzymology 2002;358():452-84.
2001: Oger P; Farrand S K
Co-evolution of the agrocinopine opines and the agrocinopine-mediated control of TraR, the quorum-sensing activator of the Ti plasmid conjugation system.
Molecular microbiology 2001;41(5):1173-85.
2001: Luo Z Q; Farrand S K
The Agrobacterium tumefaciens rnd homolog is required for TraR-mediated quorum-dependent activation of Ti plasmid tra gene expression.
Journal of bacteriology 2001;183(13):3919-30.
2001: Kim K S; Baek C H; Lee J K; Yang J M; Farrand S K
Intracellular accumulation of mannopine, an opine produced by crown gall tumors, transiently inhibits growth of Agrobacterium tumefaciens.
Molecular plant-microbe interactions : MPMI 2001;14(6):793-803.
2001: Penyalver R; Oger P; López M M; Farrand S K
Iron-binding compounds from Agrobacterium spp.: biological control strain Agrobacterium rhizogenes K84 produces a hydroxamate siderophore.
Applied and environmental microbiology 2001;67(2):654-64.
2001: Luo Z Q; Clemente T E; Farrand S K
Construction of a derivative of Agrobacterium tumefaciens C58 that does not mutate to tetracycline resistance.
Molecular plant-microbe interactions : MPMI 2001;14(1):98-103.
2000: Palanichelvam K; Oger P; Clough S J; Cha C; Bent A F; Farrand S K
A second T-region of the soybean-supervirulent chrysopine-type Ti plasmid pTiChry5, and construction of a fully disarmed vir helper plasmid.
Molecular plant-microbe interactions : MPMI 2000;13(10):1081-91.
2000: Qin Y; Luo Z Q; Smyth A J; Gao P; Beck von Bodman S; Farrand S K
Quorum-sensing signal binding results in dimerization of TraR and its release from membranes into the cytoplasm.
The EMBO journal 2000;19(19):5212-21.
2000: Luo Z Q; Qin Y; Farrand S K
The antiactivator TraM interferes with the autoinducer-dependent binding of TraR to DNA by interacting with the C-terminal region of the quorum-sensing activator.
The Journal of biological chemistry 2000;275(11):7713-22.
2000: Hamilton C M; Lee H; Li P L; Cook D M; Piper K R; von Bodman S B; Lanka E; Ream W; Farrand S K
TraG from RP4 and TraG and VirD4 from Ti plasmids confer relaxosome specificity to the conjugal transfer system of pTiC58.
Journal of bacteriology 2000;182(6):1541-8.
2000: Piper K R; Farrand S K
Quorum sensing but not autoinduction of Ti plasmid conjugal transfer requires control by the opine regulon and the antiactivator TraM.
Journal of bacteriology 2000;182(4):1080-8.
2000: Cho H J; Farrand S K; Noel G R; Widholm J M
High-efficiency induction of soybean hairy roots and propagation of the soybean cyst nematode.
Planta 2000;210(2):195-204.
2000: Li P L; Farrand S K
The replicator of the nopaline-type Ti plasmid pTiC58 is a member of the repABC family and is influenced by the TraR-dependent quorum-sensing regulatory system.
Journal of bacteriology 2000;182(1):179-88.
1999: Hwang I; Smyth A J; Luo Z Q; Farrand S K
Modulating quorum sensing by antiactivation: TraM interacts with TraR to inhibit activation of Ti plasmid conjugal transfer genes.
Molecular microbiology 1999;34(2):282-94.
1999: Li P L; Hwang I; Miyagi H; True H; Farrand S K
Essential components of the Ti plasmid trb system, a type IV macromolecular transporter.
Journal of bacteriology 1999;181(16):5033-41.
1999: Luo Z Q; Farrand S K
Signal-dependent DNA binding and functional domains of the quorum-sensing activator TraR as identified by repressor activity.
Proceedings of the National Academy of Sciences of the United States of America 1999;96(16):9009-14.
1999: Piper K R; Beck Von Bodman S; Hwang I; Farrand S K
Hierarchical gene regulatory systems arising from fortuitous gene associations: controlling quorum sensing by the opine regulon in Agrobacterium.
Molecular microbiology 1999;32(5):1077-89.
1999: Piper K R; Farrand S K
Conjugal transfer but not quorum-dependent tra gene induction of pTiC58 requires a solid surface.
Applied and environmental microbiology 1999;65(6):2798-801.
1999: Luo Z Q; Farrand S K
Cloning and characterization of a tetracycline resistance determinant present in Agrobacterium tumefaciens C58.
Journal of bacteriology 1999;181(2):618-26.
1998: Li P L; Everhart D M; Farrand S K
Genetic and sequence analysis of the pTiC58 trb locus, encoding a mating-pair formation system related to members of the type IV secretion family.
Journal of bacteriology 1998;180(23):6164-72.
1998: Cha C; Gao P; Chen Y C; Shaw P D; Farrand S K
Production of acyl-homoserine lactone quorum-sensing signals by gram-negative plant-associated bacteria.
Molecular plant-microbe interactions : MPMI 1998;11(11):1119-29.
1998: Kim H; Farrand S K
Opine catabolic loci from Agrobacterium plasmids confer chemotaxis to their cognate substrates.
Molecular plant-microbe interactions : MPMI 1998;11(2):131-43.
1998: Oger P; Kim K S; Sackett R L; Piper K R; Farrand S K
Octopine-type Ti plasmids code for a mannopine-inducible dominant-negative allele of traR, the quorum-sensing activator that regulates Ti plasmid conjugal transfer.
Molecular microbiology 1998;27(2):277-88.
1997: Kim H; Farrand S K
Characterization of the acc operon from the nopaline-type Ti plasmid pTiC58, which encodes utilization of agrocinopines A and B and susceptibility to agrocin 84.
Journal of bacteriology 1997;179(23):7559-72.
1997: Hong S B; Hwang I; Dessaux Y; Guyon P; Kim K S; Farrand S K
A T-DNA gene required for agropine biosynthesis by transformed plants is functionally and evolutionarily related to a Ti plasmid gene required for catabolism of agropine by Agrobacterium strains.
Journal of bacteriology 1997;179(15):4831-40.
1997: Shaw P D; Ping G; Daly S L; Cha C; Cronan J E; Rinehart K L; Farrand S K
Detecting and characterizing N-acyl-homoserine lactone signal molecules by thin-layer chromatography.
Proceedings of the National Academy of Sciences of the United States of America 1997;94(12):6036-41.
1997: Cook D M; Li P L; Ruchaud F; Padden S; Farrand S K
Ti plasmid conjugation is independent of vir: reconstitution of the tra functions from pTiC58 as a binary system.
Journal of bacteriology 1997;179(4):1291-7.
1996: Alt-Mörbe J; Stryker J L; Fuqua C; Li P L; Farrand S K; Winans S C
The conjugal transfer system of Agrobacterium tumefaciens octopine-type Ti plasmids is closely related to the transfer system of an IncP plasmid and distantly related to Ti plasmid vir genes.
Journal of bacteriology 1996;178(14):4248-57.
1996: Farrand S K; Hwang I; Cook D M
The tra region of the nopaline-type Ti plasmid is a chimera with elements related to the transfer systems of RSF1010, RP4, and F.
Journal of bacteriology 1996;178(14):4233-47.
1996: Kim K S; Chilton W S; Farrand S K
A Ti plasmid-encoded enzyme required for degradation of mannopine is functionally homologous to the T-region-encoded enzyme required for synthesis of this opine in crown gall tumors.
Journal of bacteriology 1996;178(11):3285-92.
1996: Kim K S; Farrand S K
Ti plasmid-encoded genes responsible for catabolism of the crown gall opine mannopine by Agrobacterium tumefaciens are homologs of the T-region genes responsible for synthesis of this opine by the plant tumor.
Journal of bacteriology 1996;178(11):3275-84.
1996: Hong S B; Farrand S K
Purification and characterization of catabolic mannopine cyclase encoded by the Agrobacterium tumefaciens Ti plasmid pTi15955.
Journal of bacteriology 1996;178(8):2427-30.
1995: Beck von Bodman S; Farrand S K
Capsular polysaccharide biosynthesis and pathogenicity in Erwinia stewartii require induction by an N-acylhomoserine lactone autoinducer.
Journal of bacteriology 1995;177(17):5000-8.
1995: von Bodman S B; Domier L L; Farrand S K
Expression of multiple eukaryotic genes from a single promoter in Nicotiana.
Bio/technology (Nature Publishing Company) 1995;13(6):587-91.
1995: Hwang I; Cook D M; Farrand S K
A new regulatory element modulates homoserine lactone-mediated autoinduction of Ti plasmid conjugal transfer.
Journal of bacteriology 1995;177(2):449-58.
1994: Hong S B; Farrand S K
Functional role of the Ti plasmid-encoded catabolic mannopine cyclase in mannityl opine catabolism by Agrobacterium spp.
Journal of bacteriology 1994;176(12):3576-83.
1994: Hwang I; Li P L; Zhang L; Piper K R; Cook D M; Tate M E; Farrand S K
TraI, a LuxI homologue, is responsible for production of conjugation factor, the Ti plasmid N-acylhomoserine lactone autoinducer.
Proceedings of the National Academy of Sciences of the United States of America 1994;91(11):4639-43.
1994: Hwang I; Farrand S K
A novel gene tag for identifying microorganisms released into the environment.
Applied and environmental microbiology 1994;60(3):913-20.
1993: Hayman G T; Beck von Bodman S; Kim H; Jiang P; Farrand S K
Genetic analysis of the agrocinopine catabolic region of Agrobacterium tumefaciens Ti plasmid pTiC58, which encodes genes required for opine and agrocin 84 transport.
Journal of bacteriology 1993;175(17):5575-84.
1993: Piper K R; Beck von Bodman S; Farrand S K
Conjugation factor of Agrobacterium tumefaciens regulates Ti plasmid transfer by autoinduction.
Nature 1993;362(6419):448-50.
1993: Hong S B; Dessaux Y; Chilton W S; Farrand S K
Organization and regulation of the mannopine cyclase-associated opine catabolism genes in Agrobacterium tumefaciens 15955.
Journal of bacteriology 1993;175(2):401-10.
1992: Farrand S K; Wang C L; Hong S B; O'Morchoe S B; Slota J E
Deletion derivatives of pAgK84 and their use in the analysis of Agrobacterium plasmid functions.
Plasmid 1992;28(3):201-12.
1992: Cook D M; Farrand S K
The oriT region of the Agrobacterium tumefaciens Ti plasmid pTiC58 shares DNA sequence identity with the transfer origins of RSF1010 and RK2/RP4 and with T-region borders.
Journal of bacteriology 1992;174(19):6238-46.
1992: LaPointe G; Nautiyal C S; Chilton W S; Farrand S K; Dion P
Spontaneous mutation conferring the ability to catabolize mannopine in Agrobacterium tumefaciens.
Journal of bacteriology 1992;174(8):2631-9.
1992: Beck von Bodman S; Hayman G T; Farrand S K
Opine catabolism and conjugal transfer of the nopaline Ti plasmid pTiC58 are coordinately regulated by a single repressor.
Proceedings of the National Academy of Sciences of the United States of America 1992;89(2):643-7.
1990: Hayman G T; Farrand S K
Agrobacterium plasmids encode structurally and functionally different loci for catabolism of agrocinopine-type opines.
Molecular & general genetics : MGG 1990;223(3):465-73.
1990: Farrand S K; Tempé J; Dessaux Y
Localization and characterization of the region encoding catabolism of mannopinic acid from the octopine-type Ti plasmid pTi15955.
Molecular plant-microbe interactions : MPMI 1990;3(4):259-67.
1989: Farrand S K; O'Morchoe S P; McCutchan J
Construction of an Agrobacterium tumefaciens C58 recA mutant.
Journal of bacteriology 1989;171(10):5314-21.
1989: von Bodman S B; McCutchan J E; Farrand S K
Characterization of conjugal transfer functions of Agrobacterium tumefaciens Ti plasmid pTiC58.
Journal of bacteriology 1989;171(10):5281-9.
1988: Dessaux Y; Guyon P; Petit A; Tempé J; Demarez M; Legrain C; Tate M E; Farrand S K
Opine utilization by Agrobacterium spp.: octopine-type Ti plasmids encode two pathways for mannopinic acid degradation.
Journal of bacteriology 1988;170(7):2939-46.
1988: Hayman G T; Farrand S K
Characterization and mapping of the agrocinopine-agrocin 84 locus on the nopaline Ti plasmid pTiC58.
Journal of bacteriology 1988;170(4):1759-67.
1987: Ryder M H; Slota J E; Scarim A; Farrand S K
Genetic analysis of agrocin 84 production and immunity in Agrobacterium spp.
Journal of bacteriology 1987;169(9):4184-9.
1987: Dessaux Y; Tempé J; Farrand S K
Genetic analysis of mannityl opine catabolism in octopine-type Agrobacterium tumefaciens strain 15955.
Molecular & general genetics : MGG 1987;208(1-2):301-8.
1986: Dessaux Y; Guyon P; Farrand S K; Petit A; Tempé J
Agrobacterium Ti and Ri plasmids specify enzymic lactonization of mannopine to agropine.
Journal of general microbiology 1986;132(9):2549-59.
1986: Farrand S K; Dessaux Y
Proline biosynthesis encoded by the noc and occ loci of Agrobacterium Ti plasmids.
Journal of bacteriology 1986;167(2):732-4.
1985: Farrand S K; Slota J E; Shim J S; Kerr A
Tn5 insertions in the agrocin 84 plasmid: the conjugal nature of pAgK84 and the locations of determinants for transfer and agrocin 84 production.
Plasmid 1985;13(2):106-17.
1982: Slota J E; Farrand S K
Genetic isolation and physical characterization of pAgK84, the plasmid responsible for agrocin 84 production.
Plasmid 1982;8(2):175-86.

Sign-in to see more