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Article ; Online: Unwinding during stressful times: Mechanisms of helicases in meiotic recombination.

Firlej, Magdalena / Weir, John R

2022 Volume 151, Page(s) 191–215

Abstract: Successful meiosis I requires that homologous chromosomes be correctly linked before they are segregated. In most organisms this physical linkage is achieved through the generation of crossovers between the homologs. Meiotic recombination co-opts and ... ...

Abstract	Successful meiosis I requires that homologous chromosomes be correctly linked before they are segregated. In most organisms this physical linkage is achieved through the generation of crossovers between the homologs. Meiotic recombination co-opts and modifies the canonical homologous recombination pathway to successfully generate crossovers One of the central components of this pathway are a number of conserved DNA helicases. Helicases couple nucleic acid binding to nucleotide hydrolysis and use this activity to modify DNA or protein-DNA substrates. During meiosis I it is necessary for the cell to modulate the canonical DNA repair pathways in order to facilitate the generation of interhomolog crossovers. Many of these meiotic modulations take place in pathways involving DNA helicases, or with a meiosis specific helicase. This short review explores what is currently understood about these helicases, their interaction partners, and the role of regulatory modifications during meiosis I. We focus in particular on the molecular structure and mechanisms of these helicases.
MeSH term(s)	DNA Repair ; Saccharomyces cerevisiae/genetics ; Saccharomyces cerevisiae/metabolism ; Saccharomyces cerevisiae Proteins/genetics ; Saccharomyces cerevisiae Proteins/chemistry ; Saccharomyces cerevisiae Proteins/metabolism ; DNA Helicases/genetics ; DNA Helicases/metabolism ; Homologous Recombination ; Meiosis
Chemical Substances	Saccharomyces cerevisiae Proteins ; DNA Helicases (EC 3.6.4.-)
Language	English
Publishing date	2022-07-18
Publishing country	United States
Document type	Journal Article
ISSN	1557-8933 ; 0070-2153
ISSN (online)	1557-8933
ISSN	0070-2153
DOI	10.1016/bs.ctdb.2022.06.004
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Article ; Online: Biochemical characterisation of Mer3 helicase interactions and the protection of meiotic recombination intermediates.

Altmannova, Veronika / Firlej, Magdalena / Müller, Franziska / Janning, Petra / Rauleder, Rahel / Rousova, Dorota / Schäffler, Andreas / Bange, Tanja / Weir, John R

Nucleic acids research

2023 Volume 51, Issue 9, Page(s) 4363–4384

Abstract: Crossing over between homologs is critical for the stable segregation of chromosomes during the first meiotic division. Saccharomyces cerevisiae Mer3 (HFM1 in mammals) is a SF2 helicase and member of the ZMM group of proteins, that facilitates the ... ...

Abstract	Crossing over between homologs is critical for the stable segregation of chromosomes during the first meiotic division. Saccharomyces cerevisiae Mer3 (HFM1 in mammals) is a SF2 helicase and member of the ZMM group of proteins, that facilitates the formation of the majority of crossovers during meiosis. Here, we describe the structural organisation of Mer3 and using AlphaFold modelling and XL-MS we further characterise the previously described interaction with Mlh1-Mlh2. We find that Mer3 also forms a previously undescribed complex with the recombination regulating factors Top3 and Rmi1 and that this interaction is competitive with Sgs1BLM helicase. Using in vitro reconstituted D-loop assays we show that Mer3 inhibits the anti-recombination activity of Sgs1 helicase, but only in the presence of Dmc1. Thus we provide a mechanism whereby Mer3 interacts with a network of proteins to protect Dmc1 derived D-loops from dissolution.
MeSH term(s)	Cell Cycle Proteins/genetics ; Crossing Over, Genetic ; DNA Helicases/chemistry ; DNA Helicases/metabolism ; DNA-Binding Proteins/metabolism ; Homologous Recombination ; Meiosis/genetics ; Protein Binding ; Protein Folding ; RecQ Helicases/antagonists & inhibitors ; RecQ Helicases/chemistry ; RecQ Helicases/metabolism ; Saccharomyces cerevisiae/chemistry ; Saccharomyces cerevisiae/enzymology ; Saccharomyces cerevisiae/genetics ; Saccharomyces cerevisiae/metabolism ; Saccharomyces cerevisiae Proteins/chemistry ; Saccharomyces cerevisiae Proteins/metabolism ; Binding, Competitive
Chemical Substances	Cell Cycle Proteins ; DMC1 protein, S cerevisiae ; DNA Helicases (EC 3.6.4.-) ; DNA-Binding Proteins ; HFM1 protein, S cerevisiae (EC 3.6.1.-) ; MLH1 protein, S cerevisiae ; MLH2 protein, S cerevisiae ; RecQ Helicases (EC 3.6.4.12) ; Rmi1 protein, S cerevisiae ; Saccharomyces cerevisiae Proteins ; SGS1 protein, S cerevisiae (EC 3.6.1.-) ; TOP3 protein, S cerevisiae
Language	English
Publishing date	2023-03-21
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	186809-3
ISSN	1362-4962 ; 1362-4954 ; 0301-5610 ; 0305-1048
ISSN (online)	1362-4962 ; 1362-4954
ISSN	0301-5610 ; 0305-1048
DOI	10.1093/nar/gkad175
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Article ; Online: Mechanical Properties of 3D Printed Orthodontic Retainers.

Firlej, Marcel / Zaborowicz, Katarzyna / Zaborowicz, Maciej / Firlej, Ewa / Domagała, Ivo / Pieniak, Daniel / Igielska-Kalwat, Joanna / Dmowski, Artur / Biedziak, Barbara

International journal of environmental research and public health

2022 Volume 19, Issue 9

Abstract: Orthodontic retention is the final important stage of orthodontic treatment, the aim of which is to consolidate the functional and aesthetic position of teeth. Among adults, fixed retainers made of different types of wires are the most common. The aim of ...

Abstract	Orthodontic retention is the final important stage of orthodontic treatment, the aim of which is to consolidate the functional and aesthetic position of teeth. Among adults, fixed retainers made of different types of wires are the most common. The aim of this study was to analyse the mechanical properties of a new generation of fixed orthodontic retainers-printed by 3D printers. Materials and methods: The study was conducted using samples made of Nextdent MFH C&B N1 resin in the form of cuboid bars with nominal dimensions of width b = 3 mm, thickness d = 0.8 mm; 1 mm; 1.2 mm, length l = 30 mm for each type. The influence of the thickness of the retainers on their strength under loaded conditions was evaluated. Flexural strength, elastic properties, deflection, and creep were compared. The samples were aged in an artificial saliva bath at 37 ± 1 °C during the strength tests. Results: It was shown that differences in the thickness of the samples affected their elastic and strength properties. The highest average flexural modulus, the highest deflection, creep, and strength was characteristic of the samples with the highest thickness (1.2 mm). Samples with an average thickness of 1 mm had the lowest modulus of elasticity. Conclusions: The mechanical properties of 3D printed retainers show that they can be an alternative to metal retainers and the procedure of making new retainers, especially when patients have aesthetic requirements or allergies to metals.
MeSH term(s)	Adult ; Aged ; Humans ; Orthodontic Appliances, Fixed ; Orthodontic Retainers ; Printing, Three-Dimensional
Language	English
Publishing date	2022-05-09
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2175195-X
ISSN	1660-4601 ; 1661-7827
ISSN (online)	1660-4601
ISSN	1661-7827
DOI	10.3390/ijerph19095775
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Article: Bending Behaviour of Polymeric Materials Used on Biomechanics Orthodontic Appliances.

Domagała, Ivo / Przystupa, Krzysztof / Firlej, Marcel / Pieniak, Daniel / Niewczas, Agata / Biedziak, Barbara

Materials (Basel, Switzerland)

2020 Volume 13, Issue 23

Abstract: This paper discusses the issues of strength and creep of polymeric materials used in orthodontic appliances. Orthodontic biomechanics is focused on the movement of individual teeth or dental groups as a result of the force applied by orthodontic ... ...

Abstract	This paper discusses the issues of strength and creep of polymeric materials used in orthodontic appliances. Orthodontic biomechanics is focused on the movement of individual teeth or dental groups as a result of the force applied by orthodontic appliances. Stresses in the construction of functional and biomechanical appliances is generated when using the apparatus in the oral cavity. The orthodontic appliance must maintain its shape and not be damaged during treatment so strength and creep resistance are fundamental properties. It was assumed that the clinical success of orthodontic appliances can be determined by these performance properties. The aim of the work was the experimental assessment of comparative bending strength and creep resistance of selected popular polymer materials used in the production of biomechanical orthodontic appliances. Four commercial materials manufactured by the world class producers were tested: NextDent Ortho Rigid (Vertex-Dental B.V., Soesterberg, The Netherlands) marked as "1A"; Erkocryl (ERKODENT Erich Kopp GmbH, Pfalzgrafenweiler, Germany)-"2A"; Vertex Orthoplast (Vertex Dental B.V.), blue, marked as "3A" and material with the same name as "3A" but orange, marked in the article as "4A". All the tests were carried out after aging in artificial saliva for 48 h at a temperature of 37 °C. Flexular strength and flexular modulus were made using the three point bending method according to the ISO 178 technical standard. Creep tests were carried out according to the method contained in ISO 899-2. The creep test was carried out in an artificial saliva bath at 37 °C. The creep tests showed significant differences in the strength, modulus and deformability of the tested materials. The strength reliability of the tested materials also varied. The research shows that the 2A material can be used for orthodontic applications in which long-term stresses should be lower than 20 MPa.
Language	English
Publishing date	2020-12-07
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2487261-1
ISSN	1996-1944
ISSN	1996-1944
DOI	10.3390/ma13235579
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Article ; Online: kcnj13 regulates pigment cell shapes in zebrafish and has diverged by cis-regulatory evolution between Danio species.

Podobnik, Marco / Singh, Ajeet P / Fu, Zhenqiang / Dooley, Christopher M / Frohnhöfer, Hans Georg / Firlej, Magdalena / Stednitz, Sarah J / Elhabashy, Hadeer / Weyand, Simone / Weir, John R / Lu, Jianguo / Nüsslein-Volhard, Christiane / Irion, Uwe

Development (Cambridge, England)

2023 Volume 150, Issue 16

Abstract: Teleost fish of the genus Danio are excellent models to study the genetic and cellular bases of pigment pattern variation in vertebrates. The two sister species Danio rerio and Danio aesculapii show divergent patterns of horizontal stripes and vertical ... ...

Abstract	Teleost fish of the genus Danio are excellent models to study the genetic and cellular bases of pigment pattern variation in vertebrates. The two sister species Danio rerio and Danio aesculapii show divergent patterns of horizontal stripes and vertical bars that are partly caused by the divergence of the potassium channel gene kcnj13. Here, we show that kcnj13 is required only in melanophores for interactions with xanthophores and iridophores, which cause location-specific pigment cell shapes and thereby influence colour pattern and contrast in D. rerio. Cis-regulatory rather than protein coding changes underlie kcnj13 divergence between the two Danio species. Our results suggest that homotypic and heterotypic interactions between the pigment cells and their shapes diverged between species by quantitative changes in kcnj13 expression during pigment pattern diversification.
MeSH term(s)	Animals ; Cell Shape ; Melanophores/physiology ; Pigmentation/genetics ; Skin ; Zebrafish/genetics
Chemical Substances	Kir7.1 channel
Language	English
Publishing date	2023-08-24
Publishing country	England
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	90607-4
ISSN	1477-9129 ; 0950-1991
ISSN (online)	1477-9129
ISSN	0950-1991
DOI	10.1242/dev.201627
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Article: Biochemical characterisation of Mer3 helicase interactions and the protection of meiotic recombination intermediates

Altmannova, Veronika / Firlej, Magdalena / Müller, Franziska / Janning, Petra / Rauleder, Rahel / Rousova, Dorota / Schäffler, Andreas / Bange, Tanja / Weir, John R.

Nucleic Acids Research (NAR)

2023 Volume 51, Issue 9, Page(s) 4363–4384

Title translation	Biochemische Charakterisierung der Mer3-Helikase-Interaktionen und des Schutzes von meiotischen Rekombinationsintermediaten. (DeepL)
Abstract	Crossing over between homologs is critical for the stable segregation of chromosomes during the first meiotic division. Saccharomyces cerevisiae Mer3 (HFM1 in mammals) is a SF2 helicase and member of the ZMM group of proteins, that facilitates the formation of the majority of crossovers during meiosis. Here, we describe the structural organisation of Mer3 and using AlphaFold modelling and XL-MS we further characterise the previously described interaction with Mlh1-Mlh2. We find that Mer3 also forms a previously undescribed complex with the recombination regulating factors Top3 and Rmi1 and that this interaction is competitive with Sgs1 super BLM helicase. Using in vitro reconstituted D-loop assays we show that Mer3 inhibits the anti-recombination activity of Sgs1 helicase, but only in the presence of Dmc1. Thus we provide a mechanism whereby Mer3 interacts with a network of proteins to protect Dmc1 derived D-loops from dissolution.
Keywords	Cells (Biology) ; Chromosomen ; Chromosomes ; Proteine ; Proteins ; Zellen (Biologie)
Language	English
Document type	Article
ZDB-ID	186809-3
ISSN	0305-1048 ; 0301-5610
ISSN	0305-1048 ; 0301-5610
DOI	10.1093/nar/gkad175
Database	PSYNDEX

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Article ; Online: In vivo studies of resveratrol contained in cosmetic emulsions.

Igielska-Kalwat, Joanna / Firlej, Marcel / Lewandowska, Aleksandra / Biedziak, Barbara

Acta biochimica Polonica

2018 Volume 66, Issue 3, Page(s) 371–374

Abstract: The cosmetic and pharmaceutical industry is constantly on the lookout for new and efficient active substances. In this article, we focus on resveratrol, an active substance with beneficial health properties, which is obtained, among others, from vines ... ...

Abstract	The cosmetic and pharmaceutical industry is constantly on the lookout for new and efficient active substances. In this article, we focus on resveratrol, an active substance with beneficial health properties, which is obtained, among others, from vines and knotweed (Reynoutria japonica). In this study, we assessed the level of skin hydration in a group of probands who used cream with or without resveratrol. The compound has been shown to have moisturizing and tightening properties, improving the overall condition of the skin.
MeSH term(s)	Emulsions/chemistry ; Epidermis/drug effects ; Galvanic Skin Response/drug effects ; Glycosaminoglycans/metabolism ; Humans ; Patch Tests ; Resveratrol/pharmacology ; Skin Aging/drug effects ; Skin Cream/chemistry ; Surveys and Questionnaires ; Volunteers ; Wound Healing/drug effects
Chemical Substances	Emulsions ; Glycosaminoglycans ; Resveratrol (Q369O8926L)
Language	English
Publishing date	2018-12-06
Publishing country	Poland
Document type	Journal Article
ZDB-ID	595762-x
ISSN	1734-154X ; 0001-527X
ISSN (online)	1734-154X
ISSN	0001-527X
DOI	10.18388/abp.2019_2838
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Article: Analysis of the Statistical Comparability of the Hardness and Wear of Polymeric Materials for Orthodontic Applications.

Domagała, Ivo / Przystupa, Krzysztof / Firlej, Marcel / Pieniak, Daniel / Gil, Leszek / Borucka, Anna / Naworol, Ireneusz / Biedziak, Barbara / Levkiv, Mariana

Materials (Basel, Switzerland)

2021 Volume 14, Issue 11

Abstract: Background: Clinical success depends on the contact strength and wear resistance of medical devices made of polymer materials. The scientific goal resulted from the problem of using different methods of surface evaluation of materials used in the ... ...

Abstract	Background: Clinical success depends on the contact strength and wear resistance of medical devices made of polymer materials. The scientific goal resulted from the problem of using different methods of surface evaluation of materials used in the production of orthodontic appliances. The purpose of the work was an experimental comparative assessment of indentation hardness and scratch hardness and the sliding wear of four selected polymeric materials used in the manufacture of orthodontic appliances. Methods: Four commercial materials were compared. Shore hardness tests and a scratch test with a Rockwell indenter were performed. A sliding wear test was performed using the ball-on-disc method. Statistical PCA and correlation analyses were performed. Results: The results of scratch hardness measurements using a contact profilometer correlated with the Shore hardness to a greater extent than measurements made using an optical microscope. PCA showed that Shore hardness explains 45% of the total variance in all the results across the materials. Conclusions: The scratch hardness method allows for a more explicit ranking of orthodontic polymeric materials when measurements are made with a profilometer. The ranking of sliding wear resistance should be made separately.
Language	English
Publishing date	2021-05-28
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2487261-1
ISSN	1996-1944
ISSN	1996-1944
DOI	10.3390/ma14112925
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Article: Effect of Artificial Aging on Mechanical and Tribological Properties of CAD/CAM Composite Materials Used in Dentistry.

Firlej, Marcel / Pieniak, Daniel / Niewczas, Agata M / Walczak, Agata / Domagała, Ivo / Borucka, Anna / Przystupa, Krzysztof / Igielska-Kalwat, Joanna / Jarosz, Wojciech / Biedziak, Barbara

Materials (Basel, Switzerland)

2021 Volume 14, Issue 16

Abstract: With easy-to-process 3D printing materials and fast production, the quality of dental services can be improved. In the conventional procedure, the dentist makes temporary crowns directly in the patient's mouth, e.g., from the most commonly used bis- ... ...

Abstract	With easy-to-process 3D printing materials and fast production, the quality of dental services can be improved. In the conventional procedure, the dentist makes temporary crowns directly in the patient's mouth, e.g., from the most commonly used bis-acrylic composites. Temporary crowns made directly in the office without the use of CAD/CAM are often of inferior quality, which directly results in impaired hygiene, poorer masticatory mechanics, greater deposition of plaque, calculus and sediment, and may adversely affect periodontal and gum health. The mechanical strength, resistance to aging and abrasion of 3D printing materials are higher than those of the soft materials used in conventional methods. This translates into durability. The patient leaves the surgery with a restoration of higher utility quality compared to the conventional method. The objective of the paper was to determine the influence of aging in artificial saliva of AM (additive manufacturing) orthodontic composites on their functional properties. For the purpose of the study, fillings well-known worldwide were selected. These were traditional UV-curable resins (M I, M II, M III, M V) and a hybrid material based on a UV-curable resin (M VI). Samples were stored in artificial saliva at 37 ± 1 °C in a thermal chamber for 6 months. Indentation hardness, frictional tests and sliding wear measurements were conducted. A comparison between various materials was made. Descriptive statistics, degradation coefficients, H
Language	English
Publishing date	2021-08-20
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	2487261-1
ISSN	1996-1944
ISSN	1996-1944
DOI	10.3390/ma14164678
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Article ; Online: Biochemical and functional characterization of a meiosis-specific Pch2/ORC AAA+ assembly.

Villar-Fernández, María Ascensión / Cardoso da Silva, Richard / Firlej, Magdalena / Pan, Dongqing / Weir, Elisabeth / Sarembe, Annika / Raina, Vivek B / Bange, Tanja / Weir, John R / Vader, Gerben

Life science alliance

2020 Volume 3, Issue 11

Abstract: Pch2 is a meiosis-specific AAA+ protein that controls several important chromosomal processes. We previously demonstrated that Orc1, a subunit of the ORC, functionally interacts with budding yeast Pch2. The ORC (Orc1-6) AAA+ complex loads the AAA+ MCM ... ...

Abstract	Pch2 is a meiosis-specific AAA+ protein that controls several important chromosomal processes. We previously demonstrated that Orc1, a subunit of the ORC, functionally interacts with budding yeast Pch2. The ORC (Orc1-6) AAA+ complex loads the AAA+ MCM helicase to origins of replication, but whether and how ORC collaborates with Pch2 remains unclear. Here, we show that a Pch2 hexamer directly associates with ORC during the meiotic G2/prophase. Biochemical analysis suggests that Pch2 uses its non-enzymatic NH
MeSH term(s)	Cell Cycle/physiology ; Cell Cycle Proteins/genetics ; DNA Helicases/genetics ; DNA Replication/genetics ; G2 Phase Cell Cycle Checkpoints/physiology ; Meiosis/genetics ; Meiosis/physiology ; Nuclear Proteins/genetics ; Nuclear Proteins/metabolism ; Nuclear Proteins/physiology ; Origin Recognition Complex/metabolism ; Origin Recognition Complex/physiology ; Prophase/physiology ; Protein Binding/genetics ; Replication Origin/genetics ; Saccharomyces cerevisiae/genetics ; Saccharomyces cerevisiae Proteins/genetics ; Saccharomyces cerevisiae Proteins/metabolism ; Saccharomyces cerevisiae Proteins/physiology ; Saccharomycetales/genetics ; Saccharomycetales/metabolism
Chemical Substances	Cell Cycle Proteins ; Nuclear Proteins ; ORC1 protein, S cerevisiae ; Origin Recognition Complex ; Pch2 protein, S cerevisiae ; Saccharomyces cerevisiae Proteins ; DNA Helicases (EC 3.6.4.-)
Language	English
Publishing date	2020-08-21
Publishing country	United States
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ISSN	2575-1077
ISSN (online)	2575-1077
DOI	10.26508/lsa.201900630
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