Abstract:
:Mutations at codon 215 of HIV-1 reverse transcriptase (RT) confer resistance to nucleoside analogs through RT-catalyzed ATP-dependent phosphorolysis. We showed that mutation T215Y is predominant over T215F (respectively 38.8 vs. 7.04% of 7312 sequences from a cohort of patients receiving antiretroviral therapy in France). Ambiguous mixtures at codon 215 (e.g. TNYS and TFSI) were resolved by cloning and sequencing representative clinical samples. Mutation T215F was preferentially associated with K70R (>71%), D67N (>73%) and K219Q/E/N (>76%), whereas T215Y was associated with M41L (>84%) and L210W (>58%). A similar distribution was observed with RT sequences stored in the Stanford HIV Drug Resistance Database. The structural background of these two distinct mutational patterns was investigated by molecular modeling of ATP-mutant RT complexes, on the basis of known ATP-protein interactions. We found that the aromatic side chain of tyrosine (Y)--but not phenylalanine (F)--optimally stacked with the adenine ring of ATP. Mutation L210W further stabilized this aromatic pi-pi stacking interaction, increasing the affinity of the T215Y/L210W double mutant for ATP. Overall, this study provides a biochemical basis accounting for the evolutionary pathway of T215 mutations in HIV-1 RT, leading to the preferential selection of T215Y vs. T215F.
journal_name
J Biomed Scijournal_title
Journal of biomedical scienceauthors
Yahi N,Fantini J,Henry M,Tourrès C,Tamalet Cdoi
10.1007/s11373-005-9011-4keywords:
subject
Has Abstractpub_date
2005-10-01 00:00:00pages
701-10issue
5eissn
1021-7770issn
1423-0127journal_volume
12pub_type
杂志文章abstract:BACKGROUND:Our previous report suggested that centrosomal P4.1-associated protein (CPAP) is required for Hepatitis B virus (HBV) encoded non-structure protein X (HBx)-mediated nuclear factor kappa light chain enhancer of activated B cells (NF-κB) activation. CPAP is overexpressed in HBV-associated hepatocellular carcin...
journal_title:Journal of biomedical science
pub_type: 杂志文章
doi:10.1186/s12929-019-0534-9
更新日期:2019-06-06 00:00:00
abstract::A three-dimensional molecular model of the transmembrane domain of the 5-HT(1A) receptor (5-HT(1A)R) is presented in the context of a general strategy for modeling the macromolecular structure of a guanine nucleotide binding, regulatory protein coupled receptor (GPCR). The model of the 5-HT(1A)R rests on the definitio...
journal_title:Journal of biomedical science
pub_type: 杂志文章
doi:10.1007/BF02255537
更新日期:1996-04-01 00:00:00
abstract:BACKGROUND:Calcium oxalate (CaOx) is the major constituent of about 75% of all urinary stone and the secondary hyperoxaluria is a primary risk factor. Current treatment options for the patients with hyperoxaluria and CaOx stone diseases are limited. Oxalate degrading bacteria might have beneficial effects on urinary ox...
journal_title:Journal of biomedical science
pub_type: 杂志文章
doi:10.1186/s12929-014-0086-y
更新日期:2014-08-30 00:00:00
abstract::Glycine N-methyltransferase (GNMT) is a protein with multiple functions. Recently, two Italian siblings who had hepatomegaly and chronic elevation of serum transaminases were diagnosed to have GNMT deficiency caused by inherited compound heterozygosity of the GNMT gene with missence mutations. To evaluate the expressi...
journal_title:Journal of biomedical science
pub_type: 杂志文章
doi:10.1007/BF02256001
更新日期:2003-01-01 00:00:00
abstract::Endotoxin shock is characterized by systemic hypotension, hyporeactiveness to vasoconstrictors and acute lung edema. A nitric oxide synthase (NOS) inhibitor, NG-monomethyl-L-arginine (L-NMMA) has been shown to be effective in reversing acute lung injury. In the present study, we evaluated the effects of NOS blockade b...
journal_title:Journal of biomedical science
pub_type: 杂志文章
doi:10.1007/BF02256421
更新日期:1999-01-01 00:00:00
abstract:BACKGROUND:Mounting evidences have showed the important role of transforming growth factor-β (TGF-β) in immunological surveillance of tumors. Some studies have also indicated human leukocyte antigen (HLA)-G-associated immune escape involving TGF-β management in gastric cancer (GC). However, the mechanism underlying it ...
journal_title:Journal of biomedical science
pub_type: 杂志文章
doi:10.1186/s12929-015-0177-4
更新日期:2015-12-02 00:00:00
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journal_title:Journal of biomedical science
pub_type: 杂志文章
doi:10.1007/s11373-006-9073-y
更新日期:2006-07-01 00:00:00
abstract:BACKGROUND:Poly(ADP-ribose) is a NAD+-requiring, DNA-repairing, enzyme playing a central role in pancreatic beta-cell death and in the development of endothelial dysfunction in humans and experimental animals. PARP activation is also relevant to the development of complications of diabetes. Hence, agents capable of inh...
journal_title:Journal of biomedical science
pub_type: 杂志文章
doi:10.1186/1423-0127-17-S1-S16
更新日期:2010-08-24 00:00:00
abstract::Induction of tumoricidal activity is one of the major functions of activated macrophages. Our previous study demonstrated that P388D1 murine macrophage-like cells secreted a plasmacytoma cytotoxic factor (PCF) that selectively killed certain tumor cell lines including MOPC-315 plasmacytoma in vitro. Our subsequent stu...
journal_title:Journal of biomedical science
pub_type: 杂志文章
doi:10.1007/BF02255919
更新日期:2000-01-01 00:00:00
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journal_title:Journal of biomedical science
pub_type: 杂志文章
doi:10.1186/1423-0127-16-110
更新日期:2009-12-09 00:00:00
abstract:BACKGROUND:Helicobacter pylori bacteria colonize human gastric mucosa, cause chronic inflammation, peptic ulcers and gastric cancer. Colonization is mediated by H. pylori adhesins, which preferentially bind mucin 5 (MUC5AC) and Lewis (Le) determinants. The aim of this study was to evaluate the influence of H. pylori an...
journal_title:Journal of biomedical science
pub_type: 杂志文章
doi:10.1186/s12929-019-0515-z
更新日期:2019-03-06 00:00:00
abstract:BACKGROUND:The type VI adenylyl cyclase (AC6) is a main contributor of cAMP production in the heart. The amino acid (aa) sequence of AC6 is highly homologous to that of another major cardiac adenylyl cyclase, AC5, except for its N-terminus (AC6-N, aa 1-86). Activation of AC6, rather than AC5, produces cardioprotective ...
journal_title:Journal of biomedical science
pub_type: 杂志文章
doi:10.1186/s12929-017-0367-3
更新日期:2017-09-04 00:00:00
abstract::Drosophila eye development is a progressive process including cell fate determination, pattern formation, and rhabdomere morphogenesis. During eye development, a dramatic change in cell shape, which involves turning and extension of the photoreceptor apical surface, occurs in the early pupal stages. It is known that a...
journal_title:Journal of biomedical science
pub_type: 杂志文章
doi:10.1007/BF02254441
更新日期:2004-05-01 00:00:00
abstract:BACKGROUND:Breast cancer is considered as an increasing major life-threatening concern among the malignancies encountered globally in females. Traditional therapy is far from satisfactory due to drug resistance and various side effects, thus a search for complementary/alternative medicines from natural sources with les...
journal_title:Journal of biomedical science
pub_type: 杂志文章
doi:10.1186/s12929-016-0257-0
更新日期:2016-04-16 00:00:00
abstract::We previously reported that transgenic ablation of gonadotrophs results in impaired development of cells immunostainable for prolactin (PRL) but not of cells immunostainable for growth hormone (GH) or pro-opiomelanocortin (POMC) in pituitary of newborn mice. The question remained whether this reduction in PRL protein ...
journal_title:Journal of biomedical science
pub_type: 杂志文章
doi:10.1159/000073968
更新日期:2003-11-01 00:00:00
abstract:BACKGROUND:Recent evidence suggests that drugs targeting Kv7 channels could be used to modulate vascular function and blood pressure. Here, we studied whether Kv7 channel inhibitors can be utilized to stabilize hemodynamics and reduce resuscitation fluid requirements after hemorrhagic shock. METHODS:Anesthetized male ...
journal_title:Journal of biomedical science
pub_type: 杂志文章
doi:10.1186/s12929-017-0316-1
更新日期:2017-01-17 00:00:00
abstract:BACKGROUND:Homeostasis of reactive oxygen species (ROS) in the skin is regulated by antioxidant defenses. The inflammatory states of skin diseases which range from acute rashes to chronic conditions are related to the level of ROS. The involvement of superoxide dismutase (SOD) in restoring the antioxidant capacity can ...
journal_title:Journal of biomedical science
pub_type: 杂志文章
doi:10.1186/s12929-016-0226-7
更新日期:2016-01-20 00:00:00
abstract::As a neurotropic virus, enterovirus A71 (EV-A71) emerge and remerge in the Asia-Pacific region since the 1990s, and has continuously been a threat to global public health, especially in children. Annually, EV-A71 results in hand-foot-and-mouth disease (HFMD) and occasionally causes severe neurological disease. Here we...
journal_title:Journal of biomedical science
pub_type: 杂志文章,评审
doi:10.1186/s12929-019-0574-1
更新日期:2019-10-21 00:00:00
abstract::Dengue virus infection presents a wide spectrum of manifestations including asymptomatic condition, dengue fever (DF), or severe forms, such as dengue hemorrhagic fever (DHF) and dengue shock syndrome (DSS) in affected individuals. The early prediction of severe dengue in patients without any warning signs who may lat...
journal_title:Journal of biomedical science
pub_type: 杂志文章,评审
doi:10.1186/s12929-015-0191-6
更新日期:2015-10-14 00:00:00
abstract:INTRODUCTION:Head and neck squamous carcinoma (HNSCC) is one of the most invasive types of cancer with high mortality. A previous study has indicated that low levels of let-7d and miR-205 in HNSCC patients are correlated with poor survival. Let-7d and miR-205 are tumor suppressors and regulators of epithelial-to-mesenc...
journal_title:Journal of biomedical science
pub_type: 杂志文章
doi:10.1186/s12929-019-0511-3
更新日期:2019-02-13 00:00:00
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journal_title:Journal of biomedical science
pub_type: 已发布勘误
doi:10.1186/s12929-020-00686-3
更新日期:2020-09-21 00:00:00
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journal_title:Journal of biomedical science
pub_type: 杂志文章
doi:10.1186/1423-0127-18-38
更新日期:2011-06-13 00:00:00
abstract::Mitochondria are the major intracellular source and target sites of reactive oxygen species (ROS) that are continually generated as by-products of aerobic metabolism in animal and human cells. It has been demonstrated that mitochondrial respiratory function declines with age in various human tissues and that a defecti...
journal_title:Journal of biomedical science
pub_type: 杂志文章
doi:10.1007/BF02258357
更新日期:1997-11-01 00:00:00
abstract::The dual signal hypothesis of apoptosis holds that a common signal can activate both apoptotic and proliferative pathways. The fate of a cell is dependent on which of these two pathways predominates. In the MAPK family of kinases, ERK and JNK have been proposed to mediate apoptosis whereas the PI3K-stimulated kinase, ...
journal_title:Journal of biomedical science
pub_type: 杂志文章
doi:10.1007/BF02255905
更新日期:1999-05-01 00:00:00
abstract::Ubiquitination modulates a large repertoire of cellular functions and thus, dysregulation of the ubiquitin system results in multiple human diseases, including cancer. Ubiquitination requires an E3 ligase, which is responsible for substrate recognition and conferring specificity to ubiquitination. HUWE1 is a multiface...
journal_title:Journal of biomedical science
pub_type: 杂志文章,评审
doi:10.1186/s12929-018-0470-0
更新日期:2018-09-04 00:00:00
abstract::Mitochondria are sub-cellular organelles that produce adenosine triphosphate (ATP) through oxidative phosphorylation (OXPHOS). As suggested over 70 years ago by Otto Warburg and recently confirmed with molecular techniques, alterations in respiratory activity and in mitochondrial DNA (mtDNA) appear to be common featur...
journal_title:Journal of biomedical science
pub_type: 杂志文章,评审
doi:10.1186/1423-0127-17-31
更新日期:2010-04-25 00:00:00
abstract::Exposure of cells and organs to heat shock is associated with numerous changes in various cellular metabolic parameters and overexpression of proteins collectively known as heat shock proteins (HSP). In this communication we review the cell-signaling events that are altered in response to heat shock as they relate to ...
journal_title:Journal of biomedical science
pub_type: 杂志文章
doi:10.1007/BF02258043
更新日期:1996-11-01 00:00:00
abstract:BACKGROUND:Cell adhesion has been shown to induce activation of certain growth factor receptors in a ligand-independent manner. However, the mechanism for such activation remains obscure. METHODS:Human epidermal carcinoma A431 cells were used as a model to examine the mechanism for adhesion-induced activation of hepat...
journal_title:Journal of biomedical science
pub_type: 杂志文章
doi:10.1186/1423-0127-18-78
更新日期:2011-10-27 00:00:00
abstract::The HIV pol sequentially encodes protease (PR), reverse transcriptase (RT), and integrase (IN) from the 5'-3' direction. We explored the significance of this gene arrangement. All six possible gene dispositions were examined. In two situations where PR was removed from the leading place and no two genes were in their ...
journal_title:Journal of biomedical science
pub_type: 杂志文章
doi:10.1007/BF02253522
更新日期:1999-09-01 00:00:00
abstract::The polymeric immunoglobulin receptor (PIGR) mediates transport of IgA and IgM antibodies across mucosal and glandular epithelia. Several studies have utilized immunohistochemistry to demonstrate that PIGR expression varies in different types of lung carcinoma, and is down-regulated during tumor progression. We have p...
journal_title:Journal of biomedical science
pub_type: 杂志文章
doi:10.1007/s11373-004-8185-5
更新日期:2005-01-01 00:00:00