Breaking News
March 22, 2018 - FDA Approves Ilumya (tildrakizumab-asmn) for the Treatment of Moderate-to-Severe Plaque Psoriasis
March 22, 2018 - Beer Raises Heart Rate; KardiaBand Hyperkalemia Test; CHD Clinics
March 22, 2018 - A retinal implant that is more effective against blindness
March 22, 2018 - New system based on artificial intelligence provides reliable detection of breast cancer
March 22, 2018 - Research offers new understanding about cause of Parkinson’s disease
March 22, 2018 - HORIBA’s Microsemi CRP analyzer improves quality of care in emergency pediatric units, study shows
March 22, 2018 - Range of Vaginal Dryness Products Can Help Postmenopausal Women: Study
March 22, 2018 - Higher Dose Tx Deemed Safe in Pulmonary TB
March 22, 2018 - Discovery of new ALS gene points to cytoskeleton as potential target for drug development
March 22, 2018 - Diet soda associated with higher odds of diabetic retinopathy
March 22, 2018 - LSD reduces ‘sense of self’
March 22, 2018 - Vitamin D deficiency linked to metabolic syndrome in postmenopausal women
March 22, 2018 - Changes in the intestines may be responsible for reversal of diabetes after bariatric surgery
March 22, 2018 - iPads and Cancer; Clot Retrieval and Stroke: It’s PodMed Double T!
March 22, 2018 - Premature births linked to changes in mother’s bacteria
March 22, 2018 - Brain SPECT scans predict treatment outcomes in patients with depression
March 21, 2018 - Researchers succeed in integrating artificial organelles into cells of living organism
March 21, 2018 - Researchers discover ‘missing mutation’ in severe infant epilepsy
March 21, 2018 - Researchers develop statistics-based computational scheme to zoom in on brain function
March 21, 2018 - Verge joins Genomics England’s Discovery Forum industry partnership
March 21, 2018 - Trovagene Announces First Patient Successfully Completes Cycle 1 of Treatment with PCM-075 in Combination with Low Dose Cytarabine (LDAC) in AML Trial
March 21, 2018 - Congenital Cardiac Cath Tx Often Strays from Guidelines
March 21, 2018 - Marked increase in cardiovascular risk factors in women after preeclampsia
March 21, 2018 - New app may help predict, track manic and depressive episodes in bipolar patients
March 21, 2018 - Discovery of genes could lead to development of novel therapies for EBV-related cancers
March 21, 2018 - High-fat, high-cholesterol diet depletes ranks of artery-protecting immune cells
March 21, 2018 - Research misconduct allegations shadow likely CDC appointee
March 21, 2018 - Most Breast Ca Patients Fail to Get Genetic Counseling
March 21, 2018 - Lopsided ear function can lead to lopsided brain development
March 21, 2018 - Acupuncture helps manage menopausal symptoms, review finds
March 21, 2018 - Motor skill training may contribute to reading skills in obese children
March 21, 2018 - Poor dental health may be related to increased diabetes risk
March 21, 2018 - Chronic opioid users at increased risk of complications after spinal fusion surgery
March 21, 2018 - Study uncovers potential therapeutic target against large family of parasites
March 21, 2018 - NSAID use linked to increased risk of atrial fibrillation
March 21, 2018 - Scientists develop brain “stethoscope” that can detect silent seizures
March 21, 2018 - New method predicts effects of global warming on disease
March 21, 2018 - Insurance Company Hurdles Burden Doctors, May Harm Patients
March 21, 2018 - Renal Transplant from HCV-Positive Donors Feasible
March 21, 2018 - Myelodysplastic syndrome: MedlinePlus Medical Encyclopedia
March 21, 2018 - Research reveals brain mechanism involved in language learning
March 21, 2018 - Many parents still hesitate to try early peanut introduction, survey finds
March 21, 2018 - Audiologist urges tinnitus sufferers facing ‘revolving door healthcare’ to seek support
March 21, 2018 - Study reveals impact of prostate cancer on wives and partners of sufferers
March 21, 2018 - ‘Almost a Miracle Drug’: What We Heard This Week
March 21, 2018 - Study shows NIH spent >$100 billion on basic science for new medicines
March 21, 2018 - Columbia researchers identify nerve cells that drive fruit fly’s escape behavior
March 21, 2018 - Sartorius Stedim Biotech selected by ABL Europe to supply single-use process technologies
March 21, 2018 - Increase in coffee consumption may help battle against colon cancer
March 21, 2018 - Hydrogel may accelerate healing of diabetic ulcers
March 21, 2018 - Dermira’s Two Phase 3 Trials Evaluating Olumacostat Glasaretil in Patients with Acne Vulgaris Did Not Meet Co-Primary Endpoints
March 21, 2018 - DePuy Synthes introduces ACTIS Total Hip System for improving initial implant stability
March 21, 2018 - ‘Oh, It Was Nothing’
March 21, 2018 - Herbal drug kratom linked to salmonella illnesses, CDC says
March 21, 2018 - New optical point-of-care device could enhance screening for thyroid nodules
March 21, 2018 - FDA Expands Approval of Adcetris (brentuximab vedotin) for First-Line Treatment of Stage III or IV Classical Hodgkin Lymphoma in Combination with Chemotherapy
March 21, 2018 - Eosinophilic Esophagitis: Late Manifestation of Allergic March
March 21, 2018 - Signaling pathway involving the Golgi apparatus identified in cells with Huntington’s disease
March 21, 2018 - Quintupling inhaled steroid doses may not benefit children with asthma
March 21, 2018 - Study shows clear connection between cardiovascular fitness in middle age and dementia risk
March 21, 2018 - Premature babies have higher risks of health complications in Bangladesh
March 21, 2018 - Child’s temperament and parenting influence weight gain in babies
March 21, 2018 - Researchers find the heart to be capable of arrhythmia termination after local gene therapy
March 21, 2018 - Inhealthcare to provide digital infrastructure for NHS to help protect people from falls
March 21, 2018 - Flu Season Finally Slowing Down
March 21, 2018 - Mixed Results for Shorter DAPT in ACS Patients
March 21, 2018 - Scientists discover fish scale-derived collagen effective for healing wounds
March 21, 2018 - Genomics England announces new partnership to improve efficiency of next-generation sequencing analysis
March 21, 2018 - Adjuvant AC chemotherapy found to be effective in treating HRD-positive breast cancer patients
March 21, 2018 - Researchers identify new treatment targets for lung diseases using big data
March 21, 2018 - Kids see more women in science than five decades ago
March 21, 2018 - Research shows link between chronic fatigue syndrome and lower thyroid hormone levels
March 21, 2018 - Alzheimer’s disease on the rise
March 21, 2018 - Two Agents Equal as Pretreatment for Adrenal Tumor Surgery
March 21, 2018 - ‘Icebreaker’ protein opens genome for T cell development, researchers find
March 21, 2018 - Women in medicine shout #Metoo about sexual harassment at work
March 21, 2018 - Mother’s pre-pregnancy waist size may be linked to child’s autism risk
March 21, 2018 - Second hand marijuana smoke can cause serious damage
March 21, 2018 - International study shows benefits of using MRI at the start of prostate cancer diagnosis
March 20, 2018 - Santhera Reports Outcome of Exploratory Trial with Idebenone in PPMS Conducted at the NIH
Multifunctional protein also plays role in development of blood cells

Multifunctional protein also plays role in development of blood cells

image_pdfDownload PDFimage_print

Like an actor who excels at both comedy and drama, proteins also can play multiple roles. Uncovering these varied talents can teach researchers more about the inner workings of cells. It also can yield new discoveries about evolution and how proteins have been conserved across species over hundreds of millions of years.

In a new finding, a team of investigators from the Salk Institute has uncovered in mouse cells a previously unknown job for a protein called nup98. In addition to helping control the movement of molecules in and out of the nucleus of the cell, they found that it also helps direct the development of blood cells, enabling immature blood stem cells to differentiate into many specialized mature cell types. Further, they discovered the mechanism by which–when perturbed–this differentiation process can contribute to the formation of certain types of leukemia. The findings are published in Genes & Development.

“This research was really a tour de force,” says Martin Hetzer, Salk’s Chief Science Officer and the study’s senior author. “Tobias Franks, my postdoctoral researcher at the time and the paper’s first author, used an approach that combined genomics, proteomics, and cell biology. This model wasn’t easy to study, and he developed some very clever techniques in the lab to answer these questions.”

For years, Hetzer’s lab has focused on a class of proteins called nucleoporins (nups for short), which are part of the nuclear pore complex. This complex regulates traffic between the nucleus of the cell, where the genetic material is located, and the cytoplasm, which contains other cellular structures. There are about 30 proteins in the nucleoporin family, and they carry out a number of different functions in addition to forming the nuclear pore. Several of them are known to act as transcription factors: This means they help to regulate when and how genes get translated into proteins.

The finding that nup98 has this additional function was not entirely unexpected. Earlier research from Hetzer’s lab had found that it plays a role in gene regulation in other cell types. But the team didn’t know about its function in hematopoietic (blood) cells.

In addition, until now the mechanism of how nup98 regulates transcription was not known. The investigators found that it acts through a link with a protein complex called Wdr82-Set1/COMPASS, which is part of the cell’s epigenetic machinery. “This epigenetic process helps to control when genes are transcribed into proteins and when transcription is blocked,” says Hetzer, who also holds the Jesse and Caryl Phillips Foundation Chair.

Another thing that was different about this study is that it was done in mouse cells rather than simpler model organisms like yeast and fruit flies. “This is the first mechanistic insight of how one of these nup proteins works in mammals,” Hetzer adds. “We have only touched the surface here in uncovering how this evolutionarily conserved mechanism works in mammalian cells.” Future work in his lab will extend the study of nup98 to primates and humans.

While Hetzer has no immediate plans to pursue their findings as an avenue for developing leukemia drugs, he says it’s likely that others may pick up on this aspect of the research. Disruption of the cell differentiation process that contributes to leukemia results from a single gene fusion, when two parts of chromosomes that are not meant to act on each other become linked. He says that cancers driven by a single genetic change like this have proven easier to block with drugs than cancer driven by multiple genetic alterations.​


Multifunctional protein contributes to blood cell development

Tagged with:

About author

Related Articles