ELIZA

return kwic search for used to out of >500 occurrences
298981 occurrences (No.78 in the rank) during 5 years in the PubMed. [cache]

296) This sensor-actuator is used to construct a negative feedback circuit to regulate the expression of acetyl-CoA carboxylase.

--- ABSTRACT ---

PMID:24377365 DOI:10.1021/sb400158w

2015 ACS synthetic biology

* Negative feedback regulation of fatty acid production based on a malonyl-CoA sensor-actuator.

- Engineering metabolic biosynthetic pathways has enabled the microbial production of many useful chemicals. However, pathway productivities and yields are often limited by metabolic imbalances. Synthetic regulatory circuits have been shown to be able to balance engineered pathways, improving titers and productivities. Here we developed a negative feedback regulatory circuit based on a malonyl-CoA-based sensor-actuator. Malonyl-CoA is biosynthesized from acetyl-CoA by the acetyl-CoA carboxylase, which is the rate-limiting step for fatty acid biosynthesis. Overexpression of acetyl-CoA carboxylase improves fatty acid production, but slows down cell growth. We have devised a malonyl-CoA sensor-actuator that controls gene expression levels based on intracellular malonyl-CoA concentrations. This sensor-actuator is used to construct a negative feedback circuit to regulate the expression of acetyl-CoA carboxylase. The negative feedback circuit is able to up-regulate acetyl-CoA carboxylase expression when the malonyl-CoA concentration is low and down-regulate acetyl-CoA carboxylase expression when excess amounts of malonyl-CoA have accumulated. We show that the regulatory circuit effectively alleviates the toxicity associated with acetyl-CoA carboxylase overexpression. When used to regulate the fatty acid pathway, the feedback circuit increases fatty acid titer and productivity by 34% and 33%, respectively.

--- ABSTRACT END ---

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[frequency of next (right) word to used to]

(1)28 assess	(20)5 design	(39)3 establish	(58)2 find
(2)28 identify	(21)5 increase	(40)3 observe	(59)2 fit
(3)23 evaluate	(22)5 inform	(41)3 prevent	(60)2 form
(4)20 study	(23)5 obtain	(42)3 solve	(61)2 further
(5)17 estimate	(24)5 quantify	(43)3 validate	(62)2 gain
(6)17 measure	(25)5 reconstruct	(44)2 accurately	(63)2 help
(7)16 determine	(26)4 calculate	(45)2 address	(64)2 improve
(8)16 examine	(27)4 characterize	(46)2 amplify	(65)2 make
(9)12 explore	(28)4 confirm	(47)2 avoid	(66)2 match
(10)10 treat	(29)4 construct	(48)2 be	(67)2 optimize
(11)9 analyze	(30)4 illustrate	(49)2 conduct	(68)2 perform
(12)8 develop	(31)4 reduce	(50)2 create	(69)2 prepare
(13)8 investigate	(32)4 screen	(51)2 demonstrate	(70)2 produce
(14)8 predict	(33)4 simulate	(52)2 derive	(71)2 promote
(15)7 collect	(34)4 verify	(53)2 describe	(72)2 recruit
(16)7 compare	(35)3 classify	(54)2 distinguish	(73)2 represent
(17)7 test	(36)3 compute	(55)2 explain	(74)2 select
(18)6 analyse	(37)3 control	(56)2 extrapolate
(19)6 detect	(38)3 define	(57)2 facilitate

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--- WordNet output for used --- =>1.〜に慣れて, 2.用いられた, 中古の Overview of verb use The verb use has 6 senses (first 3 from tagged texts) 1. (603) use, utilize, utilise, apply, employ -- (put into service; make work or employ for a particular purpose or for its inherent or natural purpose; "use your head!"; "we only use Spanish at home"; "I can't use this tool"; "Apply a magnetic field here"; "This thinking was applied to many projects"; "How do you utilize this tool?"; "I apply this rule to get good results"; "use the plastic bags to store the food"; "He doesn't know how to use a computer") 2. (12) use, habituate -- (take or consume (regularly or habitually); "She uses drugs rarely") 3. (8) use, expend -- (use up, consume fully; "The legislature expended its time on school questions") 4. use -- (seek or achieve an end by using to one's advantage; "She uses her influential friends to get jobs"; "The president's wife used her good connections") 5. practice, apply, use -- (avail oneself to; "apply a principle"; "practice a religion"; "use care when going down the stairs"; "use your common sense"; "practice non-violent resistance") 6. use -- (habitually do something (use only in the past tense); "She used to call her mother every week but now she calls only occasionally"; "I used to get sick when I ate in that dining hall"; "They used to vacation in the Bahamas") Overview of adj used The adj used has 3 senses (first 3 from tagged texts) 1. (4) used -- (employed in accomplishing something; "the principle of surprise is the most used and misused of all the principles of war"- H.H.Arnold & I.C.Eaker) 2. (1) exploited, ill-used, put-upon, used, victimized, victimised -- (of persons; taken advantage of; "after going out of his way to help his friend get the job he felt not appreciated but used") 3. (1) secondhand, used -- (previously used or owned by another; "bought a secondhand (or used) car") --- WordNet end ---