Jove
Visualize
Contáctanos
JoVE
x logofacebook logolinkedin logoyoutube logo
ACERCA DE JoVE
Visión GeneralLiderazgoBlogCentro de Ayuda JoVE
AUTORES
Proceso de PublicaciónConsejo EditorialAlcance y PolíticasRevisión por ParesPreguntas FrecuentesEnviar
BIBLIOTECARIOS
TestimoniosSuscripcionesAccesoRecursosConsejo Asesor de BibliotecasPreguntas Frecuentes
INVESTIGACIÓN
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchivo
EDUCACIÓN
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualCentro de Recursos para ProfesoresSitio de Profesores
Términos y Condiciones de Uso
Política de Privacidad
Políticas

Videos de Conceptos Relacionados

Genomic DNA in Prokaryotes00:46

Genomic DNA in Prokaryotes

The genome of most prokaryotic organisms consists of double-stranded DNA organized into one circular chromosome in a region of cytoplasm called the nucleoid. The chromosome is tightly wound, or supercoiled, for efficient storage. Prokaryotes also contain other circular pieces of DNA called plasmids. These plasmids are smaller than the chromosome and often carry genes that confer adaptive functions, such as antibiotic resistance.
Genomic Diversity in Bacteria
Although bacterial genomes are much...
Genome Size and the Evolution of New Genes03:21

Genome Size and the Evolution of New Genes

While every living organism has a genome of some kind (be it RNA, or DNA), there is considerable variation in the sizes of these blueprints. One major factor that impacts genome size is whether the organism is prokaryotic or eukaryotic. In prokaryotes, the genome contains little to no non-coding sequence, such that genes are tightly clustered in groups or operons sequentially along the chromosome. Conversely, the genes in eukaryotes are punctuated by long stretches of non-coding sequence.
Modern Molecular Taxonomy01:29

Modern Molecular Taxonomy

Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...
Applications of Molecular Taxonomy01:20

Applications of Molecular Taxonomy

Molecular taxonomy has revolutionized the understanding and classification of bacteria, providing precise insights into their diversity, evolutionary relationships, and ecological roles. By utilizing molecular techniques such as DNA sequencing and fingerprinting, researchers have made significant strides in various fields related to bacterial studies.Resolving Taxonomic AmbiguitiesMolecular taxonomy has been instrumental in distinguishing closely related bacterial species initially thought to...
Evolution of Microbial Genome01:08

Evolution of Microbial Genome

Microbial genome evolution is a highly dynamic process shaped by continual gene gain and loss across species and strains. This genomic flexibility allows microorganisms to adapt rapidly to environmental pressures and interactions with other organisms. Central to understanding this diversity is the distinction between the core and pan genomes.The core genome comprises the genes shared by all sampled strains of a species, representing essential functions needed for fundamental cellular processes.
Deep Sea Microbial Ecology01:18

Deep Sea Microbial Ecology

The deep ocean and its underlying sediments represent vast, largely unexplored microbial habitats that extend far beyond the sunlit photic zone. The photic (euphotic) zone typically spans the upper ~100–200 meters of pelagic waters in the open ocean, but its depth varies geographically and seasonally, where sufficient light supports photosynthetic life. Below this lies the deep sea, spanning roughly 1000–6000 meters (bathypelagic to abyssal zones), with deeper hadal trenches extending beyond...

También podría leer

Artículos Relacionados

Artículos vinculados a este trabajo por autores compartidos, revista y gráfico de citas.

Ordenar por
Same author

Exploring life's hidden majority: microbial dark matter symposium highlights.

mSphere·2026
Same author

Phosphoproteomics reveals essential regulatory roles of phosphorylation in marine oligotrophic bacteria.

Marine life science & technology·2026
Same author

Molecules, microbes, and function: synchronizing depth-resolved molecular and microbial time series at BATS.

mSystems·2026
Same author

Targeting dCas9-SunTag to a Susceptibility Gene Promoter Is Sufficient for CRISPR Interference.

Plant direct·2026
Same author

Seasonal patterns of DOM molecules are linked to microbial functions in the oligotrophic ocean.

mSystems·2025
Same author

New SAR11 isolate genomes and global marine metagenomes resolve ecologically relevant units within the Pelagibacterales.

Nature communications·2025

Video Experimental Relacionado

Updated: Jul 14, 2026

Mapping Bacterial Functional Networks and Pathways in Escherichia Coli using Synthetic Genetic Arrays
14:06

Mapping Bacterial Functional Networks and Pathways in Escherichia Coli using Synthetic Genetic Arrays

Published on: November 12, 2012

La racionalización del genoma en una cosmopolita bacteria oceánica.

Stephen J Giovannoni1, H James Tripp, Scott Givan

  • 1Department of Microbiology, Oregon State University, Corvallis, OR 97331, USA. steve.giovannoni@oregonstate.edu

Science (New York, N.Y.)
|August 20, 2005
PubMed
Resumen

Las bacterias marinas SAR11, incluida Pelagibacter ubique, representan una porción significativa de la vida microbiana oceánica. P. ubique posee el genoma más pequeño conocido para un organismo de vida libre, con vías metabólicas completas a pesar de su tamaño.

Más Videos Relacionados

Genome-wide Gene Deletions in Streptococcus sanguinis by High Throughput PCR
14:07

Genome-wide Gene Deletions in Streptococcus sanguinis by High Throughput PCR

Published on: November 23, 2012

Heuristic Mining of Hierarchical Genotypes and Accessory Genome Loci in Bacterial Populations
08:03

Heuristic Mining of Hierarchical Genotypes and Accessory Genome Loci in Bacterial Populations

Published on: December 7, 2021

Videos de Experimentos Relacionados

Last Updated: Jul 14, 2026

Mapping Bacterial Functional Networks and Pathways in Escherichia Coli using Synthetic Genetic Arrays
14:06

Mapping Bacterial Functional Networks and Pathways in Escherichia Coli using Synthetic Genetic Arrays

Published on: November 12, 2012

Genome-wide Gene Deletions in Streptococcus sanguinis by High Throughput PCR
14:07

Genome-wide Gene Deletions in Streptococcus sanguinis by High Throughput PCR

Published on: November 23, 2012

Heuristic Mining of Hierarchical Genotypes and Accessory Genome Loci in Bacterial Populations
08:03

Heuristic Mining of Hierarchical Genotypes and Accessory Genome Loci in Bacterial Populations

Published on: December 7, 2021

Área de la Ciencia:

  • Microbiología marina microbiología marina.
  • La genómica es la genómica.
  • Las proteobacterias son proteobacterias.

Sus antecedentes:

  • El clado SAR11 comprende abundantes, pequeñas y heterotróficas alfa-proteobacterias marinas.
  • Estas bacterias constituyen aproximadamente el 25% de todas las células microbianas en entornos oceánicos.

Objetivo del estudio:

  • Para caracterizar Pelagibacter ubique, el primer representante cultivado del clado SAR11.
  • Investigar las características genómicas de P. ubique, particularmente su tamaño genómico mínimo y sus capacidades metabólicas.

Principales métodos:

  • Secuenciación del genoma y análisis de Pelagibacter ubique.
  • Genómica comparativa para contrastar P. ubique con otros microorganismos de genoma pequeño.

Principales resultados:

  • Pelagibacter ubique exhibe el genoma más pequeño y el menor número de marcos de lectura abiertos previstos entre los microorganismos de vida libre.
  • A pesar de su genoma mínimo, P. ubique conserva vías biosintéticas completas para los 20 aminoácidos y la mayoría de los cofactores.
  • El genoma es excepcionalmente aerodinámico, carece de pseudogenes, intrones, transposones y posee mínimos parálogos y espaciadores intergénicos.

Conclusiones:

  • P. ubique representa un ejemplo extremo de reducción del genoma en una bacteria marina de vida libre.
  • La arquitectura genómica del organismo apoya su éxito ecológico y su amplia distribución en los océanos.