James G Umen
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Explore the profile of James G Umen including associated specialties, affiliations and a list of published articles.
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43
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1182
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Recent Articles
1.
Ge T, Gui X, Xu J, Xia W, Wang C, Yang W, et al.
Sci Adv
. 2024 Oct;
10(41):eadr2345.
PMID: 39383224
Meiotic recombination between homologous chromosomes is vital for maximizing genetic variation among offspring. However, sex-determining regions are often rearranged and blocked from recombination. It remains unclear whether rearrangements or other...
2.
Pesavento J, Bindra M, Das U, Rommelfanger S, Zhou M, Pasa-Tolic L, et al.
Anal Chem
. 2024 Aug;
96(37):14727-14733.
PMID: 39213479
We report the development of an open-source Python application that provides quantitative and qualitative information from deconvoluted liquid-chromatography top-down mass spectrometry (LC-TDMS) data sets. This simple-to-use program allows users to...
3.
Strenkert D, Yildirim A, Yan J, Yoshinaga Y, Pellegrini M, OMalley R, et al.
Plant J
. 2022 Aug;
112(2):352-368.
PMID: 35986497
Chromatin modifications are epigenetic regulatory features with major roles in various cellular events, yet they remain understudied in algae. We interrogated the genome-wide distribution pattern of mono- and trimethylated histone...
4.
Couso I, Smythers A, Ford M, Umen J, Crespo J, Hicks L
New Phytol
. 2021 Sep;
232(5):2011-2025.
PMID: 34529857
Stress and nutrient availability influence cell proliferation through complex intracellular signalling networks. In a previous study it was found that pyro-inositol polyphosphates (InsP and InsP ) produced by VIP1 kinase,...
5.
Rommelfanger S, Zhou M, Shaghasi H, Tzeng S, Evans B, Pasa-Tolic L, et al.
J Am Soc Mass Spectrom
. 2021 Jun;
32(7):1671-1688.
PMID: 34165968
We present an updated analysis of the linker and core histone proteins and their proteoforms in the green microalga by top-down mass spectrometry (TDMS). The combination of high-resolution liquid chromatographic...
6.
Yamamoto K, Hamaji T, Kawai-Toyooka H, Matsuzaki R, Takahashi F, Nishimura Y, et al.
Proc Natl Acad Sci U S A
. 2021 May;
118(21).
PMID: 34011609
Transitions between separate sexes (dioecy) and other mating systems are common across eukaryotes. Here, we study a change in a haploid dioecious green algal species with male- and female-determining chromosomes...
7.
Onishi M, Umen J, Cross F, Pringle J
Proc Natl Acad Sci U S A
. 2020 Jul;
117(31):18511-18520.
PMID: 32690698
It is widely believed that cleavage-furrow formation during cytokinesis is driven by the contraction of a ring containing F-actin and type-II myosin. However, even in cells that have such rings,...
8.
Umen J
Evodevo
. 2020 Jul;
11:13.
PMID: 32626570
The transition of life from single cells to more complex multicellular forms has occurred at least two dozen times among eukaryotes and is one of the major evolutionary transitions, but...
9.
Couso I, Perez-Perez M, Ford M, Martinez-Force E, Hicks L, Umen J, et al.
Plant Cell
. 2019 Nov;
32(1):69-80.
PMID: 31712405
Target of rapamycin complex 1 (TORC1) is a central regulator of cell growth. It balances anabolic and catabolic processes in response to nutrients, growth factors, and energy availability. Nitrogen- and...
10.
Hamaji T, Kawai-Toyooka H, Uchimura H, Suzuki M, Noguchi H, Minakuchi Y, et al.
Commun Biol
. 2018 Oct;
1:17.
PMID: 30271904
Male and female gametes differing in size-anisogamy-emerged independently from isogamous ancestors in various eukaryotic lineages, although genetic bases of this emergence are still unknown. Volvocine green algae are a model...