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The organization of pericentromeric heterochromatin in polytene chromosome 3 of the drosophila melanogaster line with the rif11; suures su(Var)3-906 mutations suppressing underreplication. / Zykova, Tatyana; Maltseva, Mariya; Goncharov, Fedor et al.
In: Cells, Vol. 10, No. 11, 2809, 11.2021.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - The organization of pericentromeric heterochromatin in polytene chromosome 3 of the drosophila melanogaster line with the rif11; suures su(Var)3-906 mutations suppressing underreplication
AU - Zykova, Tatyana
AU - Maltseva, Mariya
AU - Goncharov, Fedor
AU - Boldyreva, Lidia
AU - Pokholkova, Galina
AU - Kolesnikova, Tatyana
AU - Zhimulev, Igor
N1 - Funding Information: Funding: This research was funded by the Russian Science Foundation, grant number 19-14-00051 in molecular and cytological studies; bioinformatic studies were supported by the Fundamental Scientific Research Program, grant number 0246-2021-0014; the analysis of Drosophila mutants was carried out with the support of a joint Russian–German grant from the Russian Foundation for Basic Research, grant number 20-54-12016; part of work with the RCC1 protein was done with financial support of the RFBR, grant number 19-44-54-3017. Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2021/11
Y1 - 2021/11
N2 - Although heterochromatin makes up 40% of the Drosophila melanogaster genome, its organization remains little explored, especially in polytene chromosomes, as it is virtually not repre-sented in them due to underreplication. Two all-new approaches were used in this work: (i) with the use of a newly synthesized Drosophila line that carries three mutations, Rif11, SuURES and Su(var)3-906, suppressing the underreplication of heterochromatic regions, we obtained their fullest representation in polytene chromosomes and described their structure; (ii) 20 DNA fragments with known positions on the physical map as well as molecular genetic features of the genome (gene density, histone marks, heterochromatin proteins, origin recognition complex proteins, replication timing sites and satellite DNAs) were mapped in the newly polytenized heterochromatin using FISH and bioinformatics data. The borders of the heterochromatic regions and variations in their positions on arm 3L have been determined for the first time. The newly polytenized heterochro-matic material exhibits two main types of morphology: a banding pattern (locations of genes and short satellites) and reticular chromatin (locations of large blocks of satellite DNA). The locations of the banding and reticular polytene heterochromatin was determined on the physical map.
AB - Although heterochromatin makes up 40% of the Drosophila melanogaster genome, its organization remains little explored, especially in polytene chromosomes, as it is virtually not repre-sented in them due to underreplication. Two all-new approaches were used in this work: (i) with the use of a newly synthesized Drosophila line that carries three mutations, Rif11, SuURES and Su(var)3-906, suppressing the underreplication of heterochromatic regions, we obtained their fullest representation in polytene chromosomes and described their structure; (ii) 20 DNA fragments with known positions on the physical map as well as molecular genetic features of the genome (gene density, histone marks, heterochromatin proteins, origin recognition complex proteins, replication timing sites and satellite DNAs) were mapped in the newly polytenized heterochromatin using FISH and bioinformatics data. The borders of the heterochromatic regions and variations in their positions on arm 3L have been determined for the first time. The newly polytenized heterochro-matic material exhibits two main types of morphology: a banding pattern (locations of genes and short satellites) and reticular chromatin (locations of large blocks of satellite DNA). The locations of the banding and reticular polytene heterochromatin was determined on the physical map.
KW - CHRIZ
KW - Histone modification H3K9me2
KW - HP1
KW - Intercalary heterochromatin
KW - Pericentromeric heterochromatin
KW - Polytene chromosomes
KW - RCC1
KW - Rif1 genes
KW - Su(var)3-9
KW - The SuUR
KW - Heterochromatin/metabolism
KW - Introns/genetics
KW - Drosophila Proteins/genetics
KW - DNA Replication/genetics
KW - Histones/metabolism
KW - Repetitive Sequences, Nucleic Acid/genetics
KW - Chromosomal Proteins, Non-Histone/metabolism
KW - Replication Origin/genetics
KW - Polytene Chromosomes/genetics
KW - Nuclear Proteins/metabolism
KW - Genome, Insect
KW - Mutation/genetics
KW - Genes, Essential
KW - Repressor Proteins/genetics
KW - Drosophila melanogaster/genetics
KW - Guanine Nucleotide Exchange Factors/metabolism
KW - Animals
KW - DNA-Binding Proteins/genetics
KW - Models, Biological
KW - Carrier Proteins/genetics
KW - Protein Processing, Post-Translational
KW - Antibodies/metabolism
UR - http://www.scopus.com/inward/record.url?scp=85117258434&partnerID=8YFLogxK
U2 - 10.3390/cells10112809
DO - 10.3390/cells10112809
M3 - Article
C2 - 34831030
AN - SCOPUS:85117258434
VL - 10
JO - Cells
JF - Cells
SN - 2073-4409
IS - 11
M1 - 2809
ER -
ID: 34599446