Omar S. Harb

GiardiaDB and TrichDB: integrated genomic resources for the eukaryotic protist pathogens Giardia lamblia and Trichomonas vaginalis (2009)

Aurrecoechea, Cristina, Brestelli, John, Brunk, Brian P., Carlton, Jane M., Dommer, Jennifer, Fischer, Steve, ...

GiardiaDB (http://GiardiaDB.org) and TrichDB (http://TrichDB.org) house the genome databases for Giardia lamblia and Trichomonas vaginalis, respectively, and represent the latest additions to the...

PlasmoDB: a functional genomic database for malaria parasites (2009)

Aurrecoechea, Cristina, Brestelli, John, Brunk, Brian P., Dommer, Jennifer, Fischer, Steve, Gajria, Bindu, ...

PlasmoDB (http://PlasmoDB.org) is a functional genomic database for Plasmodium spp. that provides a resource for data analysis and visualization in a gene-by-gene or genome-wide scale. PlasmoDB...

GiardiaDB and TrichDB : integrated genomic resources for the eukaryotic protist pathogens Giardia lamblia and Trichomonas vaginalis (2008)

Aurrecoechea, Cristina, Brestelli, John, Brunk, Brian P., Carlton, Jane M., Dommer, Jennifer, Fischer, Steve, ...

© 2008 The Authors. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License. The definitive version was published in Nucleic Acids...

Multiple functionally redundant signals mediate targeting to the apicoplast in the apicomplexan parasite Toxoplasma gondii. Eukaryot. Cell 3:663–674 (2004)

Omar S. Harb, Bithi Chatterjee, Martin J. Fraunholz, Michael J. Crawford, Manami Nishi, David S. Roos

Most species of the protozoan phylum Apicomplexa harbor an endosymbiotic organelle—the apicoplast— acquired when an ancestral parasite engulfed a eukaryotic plastid-containing alga. Several...

Characterization of a Macrophage-Specific Infectivity Locus (milA) of Legionella pneumophila

Harb, Omar S., Abu Kwaik, Yousef

Legionella pneumophila has been shown to possess multiple genetic loci that play roles in its ability to survive within host cells. The mil (macrophage-specific infectivity loci) mutants of L....

Essential Role for the Legionella pneumophila Rep Helicase Homologue in Intracellular Infection of Mammalian Cells

Harb, Omar S., Abu Kwaik, Yousef

We have previously isolated 32 mutants of Legionella pneumophila that are defective in the infection of mammalian cells but not protozoa. The mutated loci have been designated macrophage-specific...

Signal Transduction in the Protozoan Host Hartmannella vermiformis upon Attachment and Invasion by Legionella micdadei

Abu Kwaik, Yousef, Venkataraman, Chandrasekar, Harb, Omar S., Gao, Liang-Yong

The intracellular pathogens Legionella micdadei and Legionella pneumophila are the two most common Legionella species that cause Legionnaires’ disease. Intracellular replication within pulmonary...

Identification of Macrophage-Specific Infectivity Loci (mil) of Legionella pneumophila That Are Not Required for Infectivity of Protozoa

Gao, Lian-Yong, Harb, Omar S., Kwaik, Yousef Abu

We have recently shown that many mutants of Legionella pneumophila exhibit similar defective phenotypes within both U937 human-derived macrophages and the protozoan host Acanthamoeba (L.-Y. Gao, O....

Identification of the Aspartate-β-Semialdehyde Dehydrogenase Gene of Legionella pneumophila and Characterization of a Null Mutant

Harb, Omar S., Kwaik, Yousef Abu

The ability of Legionella pneumophila to cause Legionnaires’ disease is dependent on its capacity to survive in the intracellular environment of its host cells. Furthermore, outbreaks of this...

Heterogeneity in the Attachment and Uptake Mechanisms of the Legionnaires’ Disease Bacterium, Legionella pneumophila, by Protozoan Hosts

Harb, Omar S., Venkataraman, Chandrasekar, Haack, Bradley J., Gao, Lian-Yong, Kwaik, Yousef Abu

Invasion and intracellular replication of Legionella pneumophila within protozoa in the environment plays a major role in the transmission of Legionnaires’ disease. Intracellular replication of L....

Multiple Functionally Redundant Signals Mediate Targeting to the Apicoplast in the Apicomplexan Parasite Toxoplasma gondii

Harb, Omar S., Chatterjee, Bithi, Fraunholz, Martin J., Crawford, Michael J., Nishi, Manami, Roos, David S.

Most species of the protozoan phylum Apicomplexa harbor an endosymbiotic organelle—the apicoplast—acquired when an ancestral parasite engulfed a eukaryotic plastid-containing alga. Several...

Disruption of a Locus Encoding a Nucleolar Zinc Finger Protein Decreases Tachyzoite-to-Bradyzoite Differentiation in Toxoplasma gondii

Vanchinathan, Padmini, Brewer, Jeremy L., Harb, Omar S., Boothroyd, John C., Singh, Upinder

During its life cycle in intermediate hosts, Toxoplasma gondii exists in two interconverting developmental stages: tachyzoites and bradyzoites. This interconversion is essential for the survival and...

Characterization of a Macrophage-Specific Infectivity Locus (milA) of Legionella pneumophila

Harb, Omar S., Abu Kwaik, Yousef

Legionella pneumophila has been shown to possess multiple genetic loci that play roles in its ability to survive within host cells. The mil (macrophage-specific infectivity loci) mutants of L....

Essential Role for the Legionella pneumophila Rep Helicase Homologue in Intracellular Infection of Mammalian Cells

Harb, Omar S., Abu Kwaik, Yousef

We have previously isolated 32 mutants of Legionella pneumophila that are defective in the infection of mammalian cells but not protozoa. The mutated loci have been designated macrophage-specific...

Signal Transduction in the Protozoan Host Hartmannella vermiformis upon Attachment and Invasion by Legionella micdadei

Abu Kwaik, Yousef, Venkataraman, Chandrasekar, Harb, Omar S., Gao, Liang-Yong

The intracellular pathogens Legionella micdadei and Legionella pneumophila are the two most common Legionella species that cause Legionnaires’ disease. Intracellular replication within pulmonary...

Identification of Macrophage-Specific Infectivity Loci (mil) of Legionella pneumophila That Are Not Required for Infectivity of Protozoa

Gao, Lian-Yong, Harb, Omar S., Kwaik, Yousef Abu

We have recently shown that many mutants of Legionella pneumophila exhibit similar defective phenotypes within both U937 human-derived macrophages and the protozoan host Acanthamoeba (L.-Y. Gao, O....

Identification of the Aspartate-β-Semialdehyde Dehydrogenase Gene of Legionella pneumophila and Characterization of a Null Mutant

Harb, Omar S., Kwaik, Yousef Abu

The ability of Legionella pneumophila to cause Legionnaires’ disease is dependent on its capacity to survive in the intracellular environment of its host cells. Furthermore, outbreaks of this...

Heterogeneity in the Attachment and Uptake Mechanisms of the Legionnaires’ Disease Bacterium, Legionella pneumophila, by Protozoan Hosts

Harb, Omar S., Venkataraman, Chandrasekar, Haack, Bradley J., Gao, Lian-Yong, Kwaik, Yousef Abu

Invasion and intracellular replication of Legionella pneumophila within protozoa in the environment plays a major role in the transmission of Legionnaires’ disease. Intracellular replication of L....

Multiple Functionally Redundant Signals Mediate Targeting to the Apicoplast in the Apicomplexan Parasite Toxoplasma gondii

Harb, Omar S., Chatterjee, Bithi, Fraunholz, Martin J., Crawford, Michael J., Nishi, Manami, Roos, David S.

Most species of the protozoan phylum Apicomplexa harbor an endosymbiotic organelle—the apicoplast—acquired when an ancestral parasite engulfed a eukaryotic plastid-containing alga. Several...

Disruption of a Locus Encoding a Nucleolar Zinc Finger Protein Decreases Tachyzoite-to-Bradyzoite Differentiation in Toxoplasma gondii

Vanchinathan, Padmini, Brewer, Jeremy L., Harb, Omar S., Boothroyd, John C., Singh, Upinder

During its life cycle in intermediate hosts, Toxoplasma gondii exists in two interconverting developmental stages: tachyzoites and bradyzoites. This interconversion is essential for the survival and...

Mining the Plasmodium genome database to define organellar function: what does the apicoplast do?

Roos, David S, Crawford, Michael J, Donald, Robert G K, Fraunholz, Martin, Harb, Omar S, He, Cynthia Y, ...

Apicomplexan species constitute a diverse group of parasitic protozoa, which are responsible for a wide range of diseases in many organisms. Despite differences in the diseases they cause, these...

In Silico Identification of Specialized Secretory-Organelle Proteins in Apicomplexan Parasites and In Vivo Validation in Toxoplasma gondii

Chen, ZhongQiang, Harb, Omar S., Roos, David S.

Apicomplexan parasites, including the human pathogens Toxoplasma gondii and Plasmodium falciparum, employ specialized secretory organelles (micronemes, rhoptries, dense granules) to invade and...

GiardiaDB and TrichDB: integrated genomic resources for the eukaryotic protist pathogens Giardia lamblia and Trichomonas vaginalis

Aurrecoechea, Cristina, Brestelli, John, Brunk, Brian P., Carlton, Jane M., Dommer, Jennifer, Fischer, Steve, ...

GiardiaDB (http://GiardiaDB.org) and TrichDB (http://TrichDB.org) house the genome databases for Giardia lamblia and Trichomonas vaginalis, respectively, and represent the latest additions to the...

PlasmoDB: a functional genomic database for malaria parasites

Aurrecoechea, Cristina, Brestelli, John, Brunk, Brian P., Dommer, Jennifer, Fischer, Steve, Gajria, Bindu, ...

PlasmoDB (http://PlasmoDB.org) is a functional genomic database for Plasmodium spp. that provides a resource for data analysis and visualization in a gene-by-gene or genome-wide scale. PlasmoDB...