10 matches found in 9 documents. Search time: 0.009 seconds. |
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Score: 2.00 | Title: The evolutionarily conserved OsPRR quintet : rice pseudo-response regulators implicated in circadian rhythm .
| Author: Murakami M Ashikari M Miura K Yamashino T Mizuno T | Journal: Plant Cell Physiol .
Citation: V : 44 ( 11 ) P : 1229-36 Year: 2003 Type: ARTICLE | Literature: oryza Field: abstract Doc ID: pub14634161 Accession (PMID): 14634161 | Abstract: In Arabidopsis thaliana , a number of circadian-associated factors have been identified , including TOC1 ( TIMING OF CAB EXPRESSION 1 ) that is believed to be a component of the central oscillator .
TOC1 is a member of a small family of proteins , designated as ARABIDOPSIS PSEUDO-RESPONSE REGULATORS ( APRR1/TOC1 , APRR3 , APRR5 , APRR7 , and APRR9 ) .
As demonstrated previously , these APRR1/TOC1 quintet members are crucial for a better understanding of the molecular links between circadian rhythms , control of flowering time through photoperiodic pathways , and also photosensory signal transduction in this dicotyledonous plant .
In this respect , both the dicotyledonous ( eg A thaliana ) and monocotyledonous ( eg Oryza sativa ) plants might share the evolutionarily conserved molecular mechanism underlying the circadian rhythm .
Based on such an assumption , and as the main objective of this study , we asked the question of whether rice also has a set of pseudo-response regulators , and if so , whether or not they are associated with the circadian rhythm .
Here we showed that rice has five members of the OsPRR family ( Oryza sativa Pseudo-Response Regulator ) , and also that the expressions of these OsPRR genes are under the control of circadian rhythm .
They are expressed in a diurnal and sequential manner in the order of OsPRR73 ( OsPRR37 ) -->OsPRR95 ( OsPRR59 ) -->OsPRR1 , which is reminiscent of the circadian waves of the APRR1/TOC1 quintet in A thaliana .
These and other results of this study suggested that the OsPRR quintet , including the ortholog of APRR1/TOC1 , might play important roles within , or close to , the circadian clock of rice . | Matching Sentences: [ Sen. 1, subscore: 1.00 ]: In Arabidopsis thaliana , a number of circadian-associated factors have been identified , including TOC1 ( TIMING OF CAB EXPRESSION 1 ) that is believed to be a component of the central oscillator . [ Sen. 2, subscore: 1.00 ]: TOC1 is a member of a small family of proteins , designated as ARABIDOPSIS PSEUDO-RESPONSE REGULATORS ( APRR1/TOC1 , APRR3 , APRR5 , APRR7 , and APRR9 ) .
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Score: 1.00 | Title: The evolution of CONSTANS-like gene families in barley , rice , and Arabidopsis .
| Author: Griffiths S Dunford RP Coupland G Laurie DA .
| Journal: Plant Physiol .
Citation: V : 131 ( 4 ) P : 1855-67 Year: 2003 Type: ARTICLE | Literature: oryza Field: abstract Doc ID: pub12692345 Accession (PMID): 12692345 | Abstract: The CO ( CONSTANS ) gene of Arabidopsis has an important role in the regulation of flowering by photoperiod .
CO is part of a gene family with 17 members that are subdivided into three classes , termed Group I to III here .
All members of the family have a CCT ( CO , CO-like , TOC1 ) domain near the carboxy terminus .
Group I genes , which include CO , have two zinc finger B-boxes near the amino terminus .
Group II genes have one B-box , and Group III genes have one B-box and a second diverged zinc finger .
Analysis of rice ( Oryza sativa ) genomic sequence identified 16 genes ( OsA-OsP ) that were also divided into these three groups , showing that their evolution predates monocot/dicot divergence .
Eight Group I genes ( HvCO1-HvCO8 ) were isolated from barley ( Hordeum vulgare ) , of which two ( HvCO1 and HvCO2 ) were highly CO like .
HvCO3 and its rice counterpart ( OsB ) had one B-box that was distantly related to Group II genes and was probably derived by internal deletion of a two B-box Group I gene .
Sequence homology and comparative mapping showed that HvCO1 was the counterpart of OsA ( Hd1 ) , a major determinant of photoperiod sensitivity in rice .
Major genes determining photoperiod response have been mapped in barley and wheat ( Triticum aestivum ) , but none corresponded to CO-like genes .
Thus , selection for variation in photoperiod response has affected different genes in rice and temperate cereals .
The peptides of HvCO1 , HvCO2 ( barley ) , and Hd1 ( rice ) show significant structural differences from CO , particularly amino acid changes that are predicted to abolish B-box2 function , suggesting an evolutionary trend toward a one-B-box structure in the most CO-like cereal genes . | Matching Sentences: [ Sen. 3, subscore: 1.00 ]: All members of the family have a CCT ( CO , CO-like , TOC1 ) domain near the carboxy terminus .
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Score: 1.00 | Title: The GATA family of transcription factors in Arabidopsis and rice .
| Author: Reyes JC Muro-Pastor MI Florencio FJ .
| Journal: Plant Physiol .
Citation: V : 134 ( 4 ) P : 1718-32 Year: 2004 Type: ARTICLE | Literature: oryza Field: abstract Doc ID: pub15084732 Accession (PMID): 15084732 | Abstract: GATA transcription factors are a group of DNA binding proteins broadly distributed in eukaryotes .
The GATA factors DNA binding domain is a class IV zinc finger motif in the form CX ( 2 ) CX ( 17-20 ) CX ( 2 ) C followed by a basic region .
In plants , GATA DNA motifs have been implicated in light-dependent and nitrate-dependent control of transcription .
Herein , we show that the Arabidopsis and the rice ( Oryza sativa ) genomes present 29 and 28 loci , respectively , that encode for putative GATA factors .
A phylogenetic analysis of the 57 GATA factors encoding genes , as well as the study of their intron-exon structure , indicates the existence of seven subfamilies of GATA genes .
Some of these subfamilies are represented in both species but others are exclusive for one of them .
In addition to the GATA zinc finger motif , polypeptides of the different subfamilies are characterized by the presence of additional domains such as an acidic domain , a CCT ( CONSTANS , CO-like , and TOC1 ) domain , or a transposase-like domain also found in FAR1 and FHY3 .
Subfamily VI comprises genes that encode putative bi-zinc finger polypeptides , also found in metazoan and fungi , and a tri-zinc finger protein which has not been previously reported in eukaryotes .
The phylogeny of the GATA zinc finger motif , excluding flanking regions , evidenced the existence of four classes of GATA zinc fingers , three of them containing 18 residues in the zinc finger loop and one containing a 20-residue loop .
Our results support multiple models of evolution of the GATA gene family in plants including gene duplication and exon shuffling . | Matching Sentences: [ Sen. 7, subscore: 1.00 ]: In addition to the GATA zinc finger motif , polypeptides of the different subfamilies are characterized by the presence of additional domains such as an acidic domain , a CCT ( CONSTANS , CO-like , and TOC1 ) domain , or a transposase-like domain also found in FAR1 and FHY3 .
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Score: 1.00 | Title: Comparative Overviews of Clock-Associated Genes of Arabidopsis thaliana and Oryza sativa .
| Author: Murakami M Tago Y Yamashino T Mizuno T | Journal: Plant Cell Physiol .
Citation: V : 48 ( 1 ) P : 110-21 Year: 2007 Type: ARTICLE | Literature: oryza Field: abstract Doc ID: pub17132630 Accession (PMID): 17132630 | Abstract: In higher plants , circadian rhythms are highly relevant to a wide range of biological processes .
To such circadian rhythms , the clock ( oscillator ) is central , and recent intensive studies on the model higher plant Arabidopsis thaliana have begun to shed light on the molecular mechanisms underlying the functions of the central clock .
Such representative clock-associated genes of A thaliana are the homologous CCA1 and LHY genes , and five PRR genes that belong to a small family of pseudo-response regulators including TOC1 .
Others are GI , ZTL , ELF3 , ELF4 , LUX/PCL1 , etc In this context , a simple question arose as to whether or not the molecular picture of the model Arabidopsis clock is conserved in other higher plants .
Here we made an effort to answer the question with special reference to Oryza sativa , providing experimental evidence that this model monocot also has a set of highly conserved clock-associated genes , such as those designated as OsCCA1 , OsPRR-series including OsTOC1/OsPRR1 , OsZTLs , OsPCL1 as well as OsGI .
These results will provide us with insight into the general roles of plant circadian clocks , such as those for the photoperiodic control of flowering time that has a strong impact on the reproduction and yield in many higher plants . | Matching Sentences: [ Sen. 3, subscore: 1.00 ]: Such representative clock-associated genes of A thaliana are the homologous CCA1 and LHY genes , and five PRR genes that belong to a small family of pseudo-response regulators including TOC1 .
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Score: 1.00 | Title: Characterization of the Rice Circadian Clock-Associated Pseudo-Response Regulators in Arabidopsis thaliana .
| Author: Murakami M Tago Y Yamashino T Mizuno T | Journal: Citation: V : ( ) P : Year: 2007 Type: ARTICLE | Literature: oryza Field: abstract Doc ID: pub17420570 Accession (PMID): 17420570 | Abstract: Members of the small family of Arabidopsis PSEUDO-RESPONSE REGULATORS ( PRR1/TOC1 , PRR3 , PRR5 , PRR7 , and PRR9 ) play roles close to the circadian clock in Arabidopsis thaliana .
We have reported that the rice ( Oryza sativa ) genome also encodes a set of PRR counterparts ( designated OsPRR1 , OsPRR37 , OsPRR59 , OsPRR73 , and OsPRR95 respectively ) .
To gain new insight into the molecular functions of OsPRRs , we carried out genetic complementation analyses by introducing two representative rice genes , OsPRR1 and OsPRR37 , into the corresponding Arabidopsis loss-of-function mutants ( toc1 and prr7 respectively ) .
The results showed that these OsPRR and AtPRR genes are genetically interchangeable at least in part , suggesting the conserved clock-associated function of these OsPRRs .
| Matching Sentences: [ Sen. 3, subscore: 1.00 ]: To gain new insight into the molecular functions of OsPRRs , we carried out genetic complementation analyses by introducing two representative rice genes , OsPRR1 and OsPRR37 , into the corresponding Arabidopsis loss-of-function mutants ( toc1 and prr7 respectively ) .
| Supplemental links/files: reference in endnote online text related articles pubmed citation | |