Chromosome News and Research

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In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.

Chromosomes are not visible in the cell’s nucleus—not even under a microscope—when the cell is not dividing. However, the DNA that makes up chromosomes becomes more tightly packed during cell division and is then visible under a microscope. Most of what researchers know about chromosomes was learned by observing chromosomes during cell division.

Each chromosome has a constriction point called the centromere, which divides the chromosome into two sections, or “arms.” The short arm of the chromosome is labeled the “p arm.” The long arm of the chromosome is labeled the “q arm.” The location of the centromere on each chromosome gives the chromosome its characteristic shape, and can be used to help describe the location of specific genes.

The impact of genome doubling on the development of cancer

Since a single cell has 2–3 m of DNA, the only method to store it is in tight coils. The answer is chromatin, a DNA-protein complex that is wrapped around histone proteins.

17 Mar 2023

TurboID-based proximity labeling in meiotic cells of Arabidopsis thaliana

During meiosis, reshuffling of genetic information between homologous chromosomes through meiotic recombination creates variable gametes and hence genetic variation in offsprings.

14 Mar 2023

Neural-network-based image recognition models for examining SCC defects

Scientists from Tokyo Metropolitan University have used machine learning to automate the identification of defects in sister chromatid cohesion. They trained a convolutional neural network (CNN) with microscopy images of individual stained chromosomes, identified by researchers as having or not having cohesion defects. After training, it was able to successfully classify 73.1% of new images. Automation promises better statistics, and more insight into the wide range of disorders which cause cohesion defects.

14 Mar 2023

Discovery could establish an effective control environment for chromosome instability

A research team, affiliated with UNIST has unveiled a key factor involved in the DNA damage response (DDR), homologous recombination (HR) and DNA interstrand crosslink (ICL) repair.

8 Mar 2023

Largest-ever genetic analysis provides insight into domestications and origin of traits in grapevine

In the largest ever genetic analysis of grapevine varieties, including samples from previously undocumented specimens in private collections, researchers provide new insights into how, when, and where wine and table grapevines were domesticated, which has been a longstanding question.

3 Mar 2023

New genetic research could make growing wheat in drought conditions easier in future

Growing wheat in drought conditions may be easier in the future, thanks to new genetic research out of the University of California, Davis.

24 Feb 2023

Mount Sinai researchers reveal mechanisms underlying autoimmunity in Down syndrome

Scientists at the Icahn School of Medicine at Mount Sinai in New York have identified which parts of the immune system go awry and contribute to autoimmune diseases in individuals with Down syndrome.

23 Feb 2023

New biomarker helps identify biological age

Once considered to be incompetent in encoding proteins due to their simple monotonous DNA repetitions, tiny telomeres at the tips of human chromosomes now appear to have a powerful biological function that could help better understand cancer and aging.

21 Feb 2023

Researchers construct the first chromosome-scale reference genome of Plantago ovata

Scientists have for the first time constructed the reference genome for the source of the popular fiber supplement, psyllium husk, which could boost supplies of the versatile plant-derived product.

16 Feb 2023

Review highlights the pathological significance of CEACAM1, 5, and 6

A new review was published in Genes & Cancer on February 1, 2023, entitled, "CEACAMS 1, 5, and 6 in disease and cancer: interactions with pathogens."

14 Feb 2023

Engineering a phage's DNA by introducing modified CRISPR-Cas machinery genes

Bacteriophages (or phages) are viruses that infect bacteria. They are the most abundant biological entity, and they can be found wherever bacteria live. To propagate themselves, phages inject their DNA into their bacterial hosts.

13 Feb 2023

Researchers pioneer a new approach to study mosquito's DNA

When it comes to DNA, one pesky mosquito turns out to be a rebel among species.

10 Feb 2023

Reshuffling of gene clusters drives the evolution of sunscreen pigments in lichens

Lichens are diverse and colorful organisms that can be found in nearly every environment on Earth, from the arctic tundra to tropical rainforests.

10 Feb 2023

Protein-rich droplets in cells linked to many unresolved diseases

Most proteins localize to distinct protein-rich droplets in cells, also known as "cellular condensates". Such proteins contain sequence features that function as address labels, telling the protein which condensate to move into.

9 Feb 2023

RNA-G quadruplexes in living cells: A real-time study

Amyotrophic lateral sclerosis (ALS), sometimes referred to as Stephen Hawking’s disease and Lou Gehrig’s disease is a neurological condition that causes the body’s muscles to gradually lose control.

2 Feb 2023

Cryo-EM helps visualize the detailed structure of viral genome replication machinery

RNA viruses, such as the coronavirus that causes COVID-19, are in a life-and-death race the moment they infect a cell.

30 Jan 2023

Persistent tumor mutation load may help predict outcome of novel immunotherapies

Cancer experts have tried, sometimes unsuccessfully, to use the total number of mutations in a tumor, called the tumor mutation burden (TMB), to predict a patient's response to immunotherapy.

27 Jan 2023

Effective anticancer strategy for selective killing of cancer cells

A study team headed by Dr Yuanliang Zhai from The University of Hong Kong’s (HKU) School of Biological Sciences and his associates from The Hong Kong University of Science and Technology (HKUST) and Institut Curie in France discovered a new mechanism of the human MCM2-7 complex in controlling replication initiation, which can be employed as a unique and effective anticancer method with the potential for selective death of cancer cells.

11 Jan 2023

Chilling tolerance trait in rice with the codon repeats at a single site

A recent study performed by Professor Chong Kang’s group from the Institute of Botany of the Chinese Academy of Sciences (CAS) has disclosed a fact that a novel cold domesticated repair mechanism for DNA damage in rice.