scholarly journals Overexpression of the SuUR gene induces reversible modifications at pericentric, telomeric and intercalary heterochromatin of Drosophila melanogaster polytene chromosomes

2003 ◽  
Vol 116 (1) ◽  
pp. 169-176 ◽  
Author(s):  
I. F. Zhimulev
Keyword(s):  
Drosophila Melanogaster ◽  
Polytene Chromosomes ◽  
Intercalary Heterochromatin ◽  
Suur Gene

Influence of the SuUR gene on intercalary heterochromatin in Drosophila melanogaster polytene chromosomes

Chromosoma ◽  
2003 ◽  
Vol 111 (6) ◽  
pp. 377-398 ◽  
Author(s):  
I. Zhimulev ◽  
E. Belyaeva ◽  
I. Makunin ◽  
V. Pirrotta ◽  
E. Volkova ◽  
...  
Keyword(s):  
Drosophila Melanogaster ◽  
Polytene Chromosomes ◽  
Intercalary Heterochromatin ◽  
Suur Gene

The SuUR gene influences the distribution of heterochromatic proteins HP1 and SU(VAR)3–9 on nurse cell polytene chromosomes of Drosophila melanogaster

Chromosoma ◽  
2006 ◽  
Vol 115 (4) ◽  
pp. 296-310 ◽  
Author(s):  
Dmitry E. Koryakov ◽  
Gunter Reuter ◽  
Patrizio Dimitri ◽  
Igor F. Zhimulev
Keyword(s):  
Drosophila Melanogaster ◽  
Nurse Cell ◽  
Polytene Chromosomes ◽  
Suur Gene

Intercalary heterochromatin in polytene chromosomes of Drosophila melanogaster

Chromosoma ◽  
2008 ◽  
Vol 117 (5) ◽  
pp. 411-418 ◽  
Author(s):  
E. S. Belyaeva ◽  
E. N. Andreyeva ◽  
S. N. Belyakin ◽  
E. I. Volkova ◽  
I. F. Zhimulev
Keyword(s):  
Drosophila Melanogaster ◽  
Polytene Chromosomes ◽  
Intercalary Heterochromatin

Effect of the Suppressor of Underreplication (SuUR) Gene on Position-Effect Variegation Silencing in Drosophila melanogaster

Genetics ◽  
2003 ◽  
Vol 165 (3) ◽  
pp. 1209-1220
Author(s):  
E S Belyaeva ◽  
L V Boldyreva ◽  
E I Volkova ◽  
R A Nanayev ◽  
A A Alekseyenko ◽  
...  
Keyword(s):  
Drosophila Melanogaster ◽  
Position Effect ◽  
Polytene Chromosomes ◽  
Morphological Characters ◽  
Position Effect Variegation ◽  
Dependent Manner ◽  
Dose Dependent ◽  
Suur Protein ◽  
Chromosome Regions ◽  
Suur Gene

Abstract It has been previously shown that the SuUR gene encodes a protein located in intercalary and pericentromeric heterochromatin in Drosophila melanogaster polytene chromosomes. The SuUR mutation suppresses the formation of ectopic contacts and DNA underreplication in polytene chromosomes; SuUR+ in extra doses enhances the expression of these characters. This study demonstrates that heterochromatin-dependent PEV silencing is also influenced by SuUR. The SuUR protein localizes to chromosome regions compacted as a result of PEV; the SuUR mutation suppresses DNA underreplication arising in regions of polytene chromosomes undergoing PEV. The SuUR mutation also suppresses variegation of both adult morphological characters and chromatin compaction observed in rearranged chromosomes. In contrast, SuUR+ in extra doses and its overexpression enhance variegation. Thus, SuUR affects PEV silencing in a dose-dependent manner. However, its effect is expressed weaker than that of the strong modifier Su(var)2-5.

Localization and characteristics of DNA underreplication zone in the 75C region of intercalary heterochromatin in Drosophila melanogaster polytene chromosomes

Chromosoma ◽  
2009 ◽  
Vol 118 (6) ◽  
pp. 747-761 ◽  
Author(s):  
Natalya G. Andreyenkova ◽  
Elena B. Kokoza ◽  
Valery F. Semeshin ◽  
Elena S. Belyaeva ◽  
Sergey A. Demakov ◽  
...  
Keyword(s):  
Drosophila Melanogaster ◽  
Polytene Chromosomes ◽  
Intercalary Heterochromatin

Reiterated genes with varying location in intercalary heterochromatin regions of Drosophila melanogaster polytene chromosomes

Chromosoma ◽  
1978 ◽  
Vol 70 (1) ◽  
pp. 1-17 ◽  
Author(s):  
E. V. Ananiev ◽  
V. A. Gvozdev ◽  
Yu. V. Ilyin ◽  
N. A. Tchurikov ◽  
G. P. Georgiev
Keyword(s):  
Drosophila Melanogaster ◽  
Polytene Chromosomes ◽  
Intercalary Heterochromatin

Border Structure of Intercalary Heterochromatin Bands of Drosophila melanogaster Polytene Chromosomes

2018 ◽  
Vol 479 (1) ◽  
pp. 114-117 ◽  
Author(s):  
V. A. Khoroshko ◽  
T. Yu. Zykova ◽  
O. O. Popova ◽  
I. F. Zhimulev
Keyword(s):  
Drosophila Melanogaster ◽  
Polytene Chromosomes ◽  
Intercalary Heterochromatin

DNA underreplication in intercalary heterochromatin regions in polytene chromosomes of Drosophila melanogaster correlates with the formation of partial chromosomal aberrations and ectopic pairing

Chromosoma ◽  
2006 ◽  
Vol 115 (5) ◽  
pp. 355-366 ◽  
Author(s):  
Elena S. Belyaeva ◽  
Sergey A. Demakov ◽  
Galina V. Pokholkova ◽  
Artyom A. Alekseyenko ◽  
Tatiana D. Kolesnikova ◽  
...  
Keyword(s):  
Drosophila Melanogaster ◽  
Chromosomal Aberrations ◽  
Polytene Chromosomes ◽  
Intercalary Heterochromatin ◽  
Ectopic Pairing

Reversible decondensation of heterochromatin regions of Drosophila melanogaster polytene chromosomes during ectopic expression of the SuUR gene

2009 ◽  
Vol 426 (1) ◽  
pp. 244-246
Author(s):  
E. B. Kokoza ◽  
T. D. Kolesnikova ◽  
I. A. Zykov ◽  
E. S. Belyaeva ◽  
I. F. Zhimulev
Keyword(s):  
Drosophila Melanogaster ◽  
Polytene Chromosomes ◽  
Ectopic Expression ◽  
Suur Gene

scholarly journals Chromosomal Distribution of Transposable Elements in Drosophila melanogaster Test of the Ectopic Recombination Model for Maintenance of Insertion Site Number

Genetics ◽  
1996 ◽  
Vol 144 (1) ◽  
pp. 197-204
Author(s):  
Christine Hoogland ◽  
Christian Biémont
Keyword(s):  
Drosophila Melanogaster ◽  
Transposable Elements ◽  
Dna Content ◽  
Recombination Rate ◽  
Alternative Hypothesis ◽  
Insertion Site ◽  
Polytene Chromosomes ◽  
Negative Relationship ◽  
Site Occupancy ◽  
Site Number

Abstract Data of insertion site localization and site occupancy frequency of P, hobo, I, copia, mdg1, mdg3, 412, 297, and roo transposable elements (TEs) on the polytene chromosomes of Drosophila melanogaster were extracted from the literature. We show that TE insertion site number per chromosomal division was significantly correlated with the amount of DNA. The insertion site number weighted by DNA content was not correlated with recombination rate for all TEs except hobo, for which a positive correlation was detected. No global tendency emerged in the relationship between TE site occupancy frequency, weighted by DNA content, and recombination rate; a strong negative correlation was, however, found for the 3L arm. A possible dominant deleterious effect of chromosomal rearrangements due to recombination between TE insertions is thus not the main factor explaining the dynamics of TEs, since this hypothesis implies a negative relationship between recombination rate and both TE insertion site number and site occupancy frequency. The alternative hypothesis of selection against deleterious effects of insertional mutations is discussed.

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