


Poorly understood
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Chamaecrista pumila has empirically been used to treat inflammation-associated complications. However, the molecular mechanism and chemical components underlying the anti-inflammatory activity of this medicinal plant are poorly understood. Hence, the present study aimed to identify main bioactive compounds from the ethyl acetate fraction of C. pumila extract, which was demonstrated to possess the strongest anti-inflammatory effect in a previous study, and provide mechanistic insights into modulation of inflammatory responses by the compound of interest.
13p
vihyuga
04-03-2025
3
1
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Calcium sulfate beads (CSBs) are biocompatible hydrophilic crystals that are used to deliver local antibiotics in periprosthetic joint infections. Hypercalcemia after placement of CSBs is uncommon and poorly understood.
3p
caothientrangnguyen
09-05-2020
14
2
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Oligomerization into multimeric complexes is a prerequisite for the chaperone function of almost all a-crystallin type heat shock proteins (a-Hsp), but the molecular details of complex assembly are poorly understood. The a-Hsp proteins from Bradyrhizobium japonicum are suitable bacterial models for structure-function studies of these ubiquitous stress proteins. They fall into two distinct classes, A and B, display chaperone activity in vitro and form oligomers of 24 subunits.
9p
research12
01-06-2013
55
6
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Complex I (NADH:ubiquinone oxidoreductase) is the largest multiprotein enzyme of the oxidative phosphorylation system. Its assembly in human cells is poorly understood and no proteins assisting this process have yet been described. A good candidate is NDUFAF1, the human homologue of Neurospora crassacomplex I chaperone CIA30. Here, we demonstrate that NDUFAF1 is a mitochondrial protein that is involved in the complex I assembly process.
10p
fptmusic
12-04-2013
48
4
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Alterations in mitochondrial activity resulting from defects in mitochond-rial DNA (mtDNA) can modulate the biogenesis of mitochondria by mech-anisms that are still poorly understood. In order to study mitochondrial biogenesis in cells with impaired mitochondrial activity, we used rho-L929 and rho 0 143 B cells (partially and totally depleted of mtDNA, respectively),
25p
fptmusic
12-04-2013
56
4
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Calcium metabolism in oysters is a very complicated and highly controlled physiological and biochemical process. However, the regulation of calcium metabolism in oyster is poorly understood. Our previous study showed that calmodulin (CaM) seemed to play a regulatory role in the process of oyster calcium metabolism. In this study, a full-length cDNA encoding a novel calmodulin-like protein (CaLP) with a long C-terminal sequence was identi-fied from pearl oysterPinctada fucata, expressed in Escherichia coliand characterizedin vitro. ...
12p
fptmusic
12-04-2013
42
3
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The twin-arginine translocation (Tat) system transports folded proteins across the bacterial plasma membrane. Three subunits, TatA, B and C, are known to be involved but their modes of action are poorly understood, as are the inter-subunit interactions occurring within Tat complexes. We have generated mutations in the single transmembrane (TM) spans of TatA and TatB, with the aim of generating structural distortions.
15p
awards
06-04-2013
33
2
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Juvenile hormones (JHs) of insects are sesquiterpenoids that regulate a great diversity of processes in development and reproduction. As yet the molecular modes of action of JH are poorly understood. TheMethoprene-tolerant (Met) gene of Drosophila melanogasterhas been found to be responsible for resistance to a JH analogue (JHA) insecticide, methoprene. Previous studies onMethave implicated its involvement in JH signaling, although direct evidence is lacking.
0p
awards
05-04-2013
40
2
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Why do proteins adopt the conformations that they do, and what determines their stabilities? While we have come to some understandingof the forces that underlie protein architecture, a precise, predictive, physicochemical explanation is still elusive. Two obstacles to addressing these questions are the unfathomable vastness of protein sequence space, and the difficulty in makingdirect phy-sical measurements on large numbers of protein variants. Here, we review combinatorial methods that have been applied to problems in protein biophysics over the last 15 years.
14p
dell39
03-04-2013
62
3
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Metallothioneins (MTs) are noncatalytic peptides involved in storage of essential ions, detoxification of nonessential metals, and scavenging of oxyradicals. They exhibit an unusual primary sequence and unique 3D arrangement. Whereas vertebrate MTs are characterized by the well-known dumbbell shape, with abdomain that binds three bivalent metal ions and anadomain that binds four ions, molluscan MT structure is still poorly understood.
10p
dell39
27-03-2013
46
4
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The tight junction protein occludin participates in cell adhesion and migra-tion and has been shown to possess antitumorigenic properties; however, the exact mechanism underlying these effects is poorly understood. In liver cell lines, we identified an occludin splice variant deleted in exon 9 (Occ DE9 ).
12p
galaxyss3
07-03-2013
53
4
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Staphylococcal enterotoxin B (SEB) has been the focus of a number of stu-dies due to its ability to promote septic shock and a massive impact on the human immune system. Even though symptoms and pathology associated with SEB is well known, early molecular events that lead to lethality are still poorly understood.
11p
galaxyss3
07-03-2013
32
3
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The functions of long smooth muscle myosin light chain kinase (L-MLCK), a molecule with multiple domains, are poorly understood. To examine the existence of further potentially functional domains in this molecule, we ana-lyzed its amino acid sequence with a tangoprogram and found a putative aggregation domain located at the 4Ig domain of the N-terminal extension.
12p
media19
06-03-2013
29
3
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The nuage is a unique organelle in animal germ cells that is known as an electron-dense amorphous structure in the perinuclear region. Although the nuage is essential for primordial germ cell (PGC) determination and devel-opment, its roles and functions are poorly understood.
9p
media19
05-03-2013
46
2
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Peroxisome proliferator-activated receptors (PPARs) are members of the nuclear hormone receptor superfamily that modulate target gene expression in response to fatty acid ligands. Their regulation by post-translational modifications has been reported but is poorly understood.
9p
media19
04-03-2013
46
1
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EnteropathogenicEscherichia coli(EPEC) has been shown to disrupt the barrier function of host intestinal epithelial tissues through entering tight junctions. However, the mechanism by which this occurs remains poorly understood. In this study, we determined that EPEC invades host cells through tight junctions as it initiates infection.
11p
vinaphone15
28-02-2013
41
2
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Helicobacter pylori, an important bacterial pathogen, causes gastric ulcer and gastric adenocarcinoma in humans. The fundamentals of basic biology such as DNA replication are poorly understood in this pathogen. In the present study, we report the cloning and functional characterization of the single-stranded DNA (ssDNA) binding protein from H. pylori.
13p
vinaphone15
27-02-2013
32
3
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Despite the critical importance of protein ubiquitination in the regulation of diverse cellular processes, the molecular mechanisms by which cells rec-ognize and transmit ubiquitin signals remain poorly understood. The endosomal sorting machinery component hepatocyte growth factor-regu-lated tyrosine kinase substrate (Hrs) contains a ubiquitin-interacting motif (UIM), which is believed to bind ubiquitinated membrane cargo proteins and mediate their sorting to the lysosomal degradation pathway.
14p
vinaphone15
27-02-2013
43
3
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Obesity is associated with a high prevalence of erectile dysfunction; how-ever, the pathophysiological link between obesity and erectile dysfunction remains poorly understood. In this minireview, we have attempted to eval-uate the existing literature pertaining to obesity and erectile dysfunction to determine whether a common pathophysiological link exists.
13p
viettel02
20-02-2013
40
3
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Cdx1 and Cdx2, which are transcription factors regulating normal intesti-nal development, have been studied as potential key molecules in the pathogenesis of the precancerous intestinal metaplasia of the human stomach. However, the regulation of Cdx1 expression in the intestinal metaplasia is poorly understood.
11p
viettel02
20-02-2013
55
1
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