QUÉ SIGNIFICA OPERON EN INGLÉS
Operon
En genética, un operón es una unidad funcional de ADN genómico que contiene un grupo de genes bajo el control de un solo promotor. Los genes se transcriben juntos en una cadena de mRNA y se traducen juntos en el citoplasma, o se someten a trans-splicing para crear mRNAs monocistrónicos que se traducen por separado, es decir, varias cadenas de mRNA que codifican cada uno un solo producto génico. El resultado de esto es que los genes contenidos en el operón se expresan juntos o no en absoluto. Varios genes deben ser co-transcritos para definir un operón. Originalmente, se pensaba que los operones existían únicamente en procariotas, pero desde el descubrimiento de los primeros operones en eucariotas a principios de la década de 1990, han surgido más pruebas que sugieren que son más comunes de lo que se suponía anteriormente. En general, la expresión de operones procarióticos conduce a la generación de ARNm policistrónicos, mientras que los operones eucariotas conducen a mRNAs monocistrónicos. Los operones también se encuentran en virus tales como bacteriófagos.
definición de operon en el diccionario inglés
La definición de operón en el diccionario es un grupo de genes adyacentes en bacterias que funcionan como una unidad, que consta de genes estructurales y un operador.
PALABRAS DEL INGLÉS RELACIONADAS CON «OPERON»
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eurofins ·
arabinose ·
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10 LIBROS DEL INGLÉS RELACIONADOS CON «OPERON»
Descubre el uso de
operon en la siguiente selección bibliográfica. Libros relacionados con
operon y pequeños extractos de los mismos para contextualizar su uso en la literatura.
1
The Lac
Operon: A Short History of a Genetic Paradigm
This book describes the history and present knowledge of a paradigmatic system, the lac operon of E. coli. The first part of the book presents the history of the operon and various schools of thought regarding genetic control in general.
The second class of noninducible mutants are ds -dominant and affect the
promoter for the lac operon. Isolation of Mutations in the lac Operon Many of the
details of the organization and regulation of the lac operon were learned from the
...
Stanley R. Maloy, John E. Cronan, David Freifelder,
1994
3
Cell and Molecular Biology: Concepts and Experiments
Consequently, turning on one gene turns on all the enzyme-producing genes of
an operon. □ The promoter is the site where the RNA polymerase binds to the
DNA prior to beginning transcription (discussed on page 426). □ The operator ...
4
Cracking the AP Biology Exam: 2004-2005
In bacteria, the region of bacterial DNA that regulates gene expression is called
an operon. One of the best-understood operons is the lac operon, which controls
expression of the enzymes that break down lactose. The operon consists of four ...
Kim Magloire, Princeton Review,
2004
5
Molecular Biology and Biotechnology: A Comprehensive Desk ...
Transcriptional repressors are important proteins used to control the activity of
prokaryotic promoters (Figure 2). Usually all enzymes used in a specific
metabolic pathway are organized into an operon that is transcribed into a
polycistronic ...
6
Gene Function: E. Coli and Its Heritable Elements
It is of classical importance since its examination led Jacob and Monod to
formulate the operon model for gene regulation. Moreover, lac is prototypic both
as an inducible and catabolite-controlled operon (the phenomenon of glucose ...
7
High-yield Cell and Molecular Biology
D. Consequently, the lac operon is under the control of the lac repressor and
CAP (inducer). This is highlighted by the response of E. coli to four culture
conditions as indicated subsequently: 1. Glucose and lactose culture medium ->
lac ...
8
Instant Notes in Biochemistry
The lac operon contains lacZ, lacY and lacA genes encoding - galactosidase,
galactose permease, and thiogalactoside transacetylase, respectively, preceded
by an operator site (Olac) and a promoter (Plac). The operon is transcribed by
RNA ...
David Hames, Nigel Hooper,
2005
The operon The concept of the operon was first proposed in 1961 by Jacob and
Monod. An operon is a unit of prokaryotic gene expression which includes co-
ordinately regulated (structural) genes and control elements which are
recognized ...
Galactose B-galactosidase CH 2 OH CH 2 OH OH O O OH H H H H H H H OH
OH OH Glucose I POZ Y A H H H H H H H H H H H OH OH OH OH OH OH OH
O O O FIGURE 3.43 lac operon structure and function. (A) (upper) The structure
of ...
Molly Fitzgerald-Hayes, Frieda Reichsman,
2009
10 NOTICIAS EN LAS QUE SE INCLUYE EL TÉRMINO «OPERON»
Conoce de qué se habla en los medios de comunicación nacionales e internacionales y cómo se emplea el término
operon en el contexto de las siguientes noticias.
DOE/Lawrence Berkeley National Laboratory
To uncover the true XA21 activator, Ronald and her collaborators studied mutations around an operon known as "RaxSTAB." Operons are ... «EurekAlert, Jul 15»
A biosynthetic pathway for a prominent class of microbiota-derived …
There is one example of a well-characterized gene cluster, the bai operon, which encodes enzymes responsible for the 7α-dehydroxylation of primary bile acids. «Nature.com, Jul 15»
Genomic potential for arsenic efflux and methylation varies among …
The ars operon of Escherichia coli confers arsenical and antimonial resistance. J Bacteriol 177: 981–986. | PubMed |; Chen F, Mackey AJ, ... «Nature.com, Jul 15»
stg fimbrial operon from S. Typhi STH2370 contributes to association …
Salmonella enterica serovar Typhi (S. Typhi) stg operon, encoding a chaperone/usher fimbria (CU), contributes to an increased adherence to ... «7thSpace Interactive, Jul 15»
Ecophysiology of an uncultivated lineage of Aigarchaeota from an …
The C. aerorheumensis population in OS also contains an operon encoding a putative tetrathionate reductase (TTR) system (_00420–_00424). «Nature.com, Jul 15»
DNA Gene Chip Market – Global Industry Analysis, Size, Share …
... Biomérieux Sa, Biometrix Technology Inc, Capitalbio Corporation, Bioneer Corporation, Eurofins Mwg Operon, Illumina Inc., Greiner Bio-One, ... «Medgadget.com, Jul 15»
Human urine helps prevent bacteria from sticking to bladder cells
Pilus assembly is controlled by an entire set of genes called the fim operon, which can be switched to ON or OFF phases by different signals. «Medical Xpress, Jun 15»
Global analyses of TetR family transcriptional regulators in …
Rv2160A is situated on a likely operon with upstream and downstream genes Rv2159c and Rv2161c, respectively. These flanking genes show ... «BMC Blogs Network, Jun 15»
Combinatorial Sec pathway analysis for improved heterologous …
... and the overexpression of prsA combined with partial dnaK operon improved the α-amylase activity of AmyL and AmyS by 160 and 173%, ... «7thSpace Interactive, Jun 15»
Iron-sulfur proteins hiding in plain sight
... a candidate protein could be overexpressed in bacteria, along with the ISC operon to increase the likelihood of Fe-S cluster insertion (step 2). «Nature.com, Jun 15»