Abstract:
:Aligned sequences from the same family (e.g. the haemoglobins) are seldom representative of the entire family. This is because (1) the sequence databases are heavily skewed toward a small number of organisms and (2) only a minute fraction of all the different family members have been sequenced. For many applications, such as using alignments or profiles to perform database searches for distantly related family members, such unequal representation requires correction. An algorithm to perform appropriate weighting of individual sequences is presented along with examples illustrating its efficacy.
journal_name
J Mol Bioljournal_title
Journal of molecular biologyauthors
Sibbald PR,Argos Pdoi
10.1016/S0022-2836(99)80003-5subject
Has Abstractpub_date
1990-12-20 00:00:00pages
813-8issue
4eissn
0022-2836issn
1089-8638pii
S0022-2836(99)80003-5journal_volume
216pub_type
杂志文章abstract::Bovine IF(1) is a basic, 84 amino acid residue protein that inhibits the hydrolytic action of the F(1)F(0) ATP synthase in mitochondria under anaerobic conditions. Its oligomerization state is dependent on pH. At a pH value below 6.5 it forms an active dimer. At higher pH values, two dimers associate to form an inacti...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.2001.4570
更新日期:2001-04-27 00:00:00
abstract::Although largely deemed as structurally conserved, catalytic metal ion sites can rearrange, thereby contributing to enzyme evolvability. Here, we show that in paraoxonase-1, a lipo-lactonase, catalytic promiscuity and divergence into an organophosphate hydrolase are correlated with an alternative mode of the catalytic...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2013.01.009
更新日期:2013-03-25 00:00:00
abstract::The DNA coding for the major outer membrane lipoprotein of Escherichia coli has been fused to the coding region of the beta-galactosidase gene to measure the effect of various mutations on the efficiency of translation initiation. The various mutants were made by either inserting or deleting a small number of nucleoti...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/0022-2836(85)90332-8
更新日期:1985-01-05 00:00:00
abstract::The Ser/Thr kinase CK2 (former name: casein kinase 2) is a heterotetrameric enzyme composed of two catalytic chains (CK2alpha) attached to a dimer of noncatalytic subunits. Together with the cyclin-dependent kinases and the mitogen-activated protein kinases, CK2alpha belongs to the CMGC family of the eukaryotic protei...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2008.01.008
更新日期:2008-03-14 00:00:00
abstract::The development and validation of a new knowledge-based scoring function (DrugScore) to describe the binding geometry of ligands in proteins is presented. It discriminates efficiently between well-docked ligand binding modes (root-mean-square deviation <2.0 A with respect to a crystallographically determined reference...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.1999.3371
更新日期:2000-01-14 00:00:00
abstract::The filamentous fungus Neurospora crassa has a branched respiratory chain. Several alternative dehydrogenases, aside from the canonical complex I enzyme, are involved in the oxidation of NAD(P)H substrates. Based on homology searches in the fungal genome, we have tentatively identified one of these proteins. The corre...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2007.02.080
更新日期:2007-05-11 00:00:00
abstract::Crystals of seryl-tRNA synthetase from Escherichia coli can be grown from ammonium sulphate/octyl glucoside solutions in two days. The crystals appear to be very suitable for X-ray analysis, diffracting to at least 2.8 A resolution and being resistant to radiation damage. The crystals are monoclinic (space group C2) w...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/0022-2836(87)90232-4
更新日期:1987-01-20 00:00:00
abstract::The nucleotide sequence of the 3D (polymerase) gene of eight epidemiologically related isolates of foot-and-mouth disease virus of serotype C1 is reported. The genetic heterogeneity of 3D RNA is compared with that of the VP1-coding RNA of the same viruses. Regression lines of substitutions per nucleotide that distingu...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/0022-2836(88)90367-1
更新日期:1988-12-05 00:00:00
abstract::S100P is a small calcium-binding protein of the S100 EF-hand-containing family of proteins. Elevated levels of its mRNA are reported to be associated with the progression to hormone independence and metastasis of prostate cancer and to be associated with loss of senescence in human breast epithelial cells in vitro. Th...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/s0022-2836(02)01278-0
更新日期:2003-01-24 00:00:00
abstract::We report a "top-down" method that uses mainly duplexes' global orientations and overall molecular dimension and shape restraints, which were extracted from experimental NMR and small-angle X-ray scattering data, respectively, to determine global architectures of RNA molecules consisting of mostly A-form-like duplexes...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2009.08.001
更新日期:2009-10-30 00:00:00
abstract::Atomistic molecular dynamics simulations and structural bioinformatics tools enable the identification of the exact mode of interaction between model pulmonary surfactant components. Two nanosecond long simulations of the N-terminal region of human surfactant protein-B (SP-B(1-25)) in dipalmitoylphosphatidylcholine (D...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/s0022-2836(02)00774-x
更新日期:2002-09-20 00:00:00
abstract::Proteorhodopsin (PR) is a recently discovered ubiquitous eubacterial retinal-binding light-driven proton pump. Almost 1000 PR variants are widely distributed in species of marine and freshwater bacteria, suggesting PR's important photobiological role. PR is a typical seven-transmembrane alpha-helical membrane protein ...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2009.01.011
更新日期:2009-03-06 00:00:00
abstract::UL9 protein and ICP8 encoded by the herpes simplex virus type 1 (HSV-1) were shown to catalyze a highly active, non-origin-dependent unwinding of DNA. UL9 protein, the HSV-1 origin binding protein, as a modest helicase activity that is greatly stimulated by the HSV-1 single strand (ss) binding protein, ICP8. Here, ele...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.1996.0287
更新日期:1996-05-24 00:00:00
abstract::The pre-steady-state kinetics of GTP hydrolysis catalysed by elongation factor G and ribosomes from Escherichia coli has been investigated by the method of quenched-flow. The GTPase activities either uncoupled from or coupled to the ribosomal translocation process were characterized under various experimental conditio...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/0022-2836(86)90495-x
更新日期:1986-06-20 00:00:00
abstract::The Tyr35-->Gly replacement in bovine pancreatic trypsin inhibitor (BPTI) has previously been shown to dramatically enhance the flexibility of the trypsin-binding region of the free inhibitor and to destabilize the interaction with the protease by about 3 kcal/mol. The effects of this replacement on the enzyme-inhibit...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2006.11.003
更新日期:2007-02-09 00:00:00
abstract::Bloom syndrome protein forms an oligomeric ring structure and belongs to a group of DNA helicases showing extensive homology to the Escherichia coli DNA helicase RecQ, a suppressor of illegitimate recombination. After over-production in E.coli, we have purified the RecQ core of BLM consisting of the DEAH, RecQ-Ct and ...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/s0022-2836(03)00534-5
更新日期:2003-06-27 00:00:00
abstract::The autonomously replicating sequences (ARSs) of pSR1, a cryptic circular DNA plasmid detected in a strain of Zygosaccharomyces rouxii, were delimited by subcloning and deletion analysis and by the isolation of nucleotide substitution mutations. A 30 base-pair (bp) sequence from inverted repeat 1 (IR1) and presumably ...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/0022-2836(89)90242-8
更新日期:1989-06-20 00:00:00
abstract::Crystal structures of Bacillus stearothermophilus TRS40 neopullulanase and its complexes with panose, maltotetraose and isopanose were determined at resolutions of 1.9, 2.4, 2.8 and 3.2A, respectively. Since the latter two carbohydrates are substrates of this enzyme, a deactivated mutant at the catalytic residue Glu35...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/s0022-2836(02)01402-x
更新日期:2003-02-07 00:00:00
abstract::Endospore formation in Bacillus subtilis is orchestrated by five developmental sigma factors and further modulated by several auxiliary transcription factors. One of these, SpoVT, regulates forespore-specific sigma(G)-dependent genes and plays a key role in the final stages of spore formation. We have determined the c...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2008.10.061
更新日期:2009-03-06 00:00:00
abstract::Alpha-tocopherol transfer protein (alpha-TTP) is a liver protein responsible for the selective retention of alpha-tocopherol from dietary vitamin E, which is a mixture of alpha, beta, gamma, and delta-tocopherols and the corresponding tocotrienols. The alpha-TTP-mediated transfer of alpha-tocopherol into nascent VLDL ...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/s0022-2836(03)00724-1
更新日期:2003-08-15 00:00:00
abstract::Although the phages P2 and P4 build their capsids from the same precursor, the product of the P2 N gene, the two capsids differ in size: P2 builds a 60 nm, T = 7 capsid from 420 subunits, whereas P4 makes a 45 nm, T = 4 capsid from 240 subunits. This difference leads to substantial changes in shell geometry and subuni...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.1995.0416
更新日期:1995-08-04 00:00:00
abstract::ThiI is an enzyme responsible for the formation of the modified base S(4)U (4-thiouridine) found at position 8 in some prokaryotic tRNAs. This base acts as a sensitive trigger for the response mechanism to UV exposure, providing protection against its damaging effects. We present the crystal structure of Bacillus anth...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2005.11.013
更新日期:2006-02-10 00:00:00
abstract::An analogue of the important folding intermediate of BPTI with only the disulphide bond between Cys30 and Cys51 has been characterized by 1H and 15N NMR techniques. In particular, the dynamics of the polypeptide backbone were characterized using (1H)-15N NOE and 15N T1 and T2 relaxation data. The intermediate is parti...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.1993.1108
更新日期:1993-02-20 00:00:00
abstract::We describe the X-ray crystallographic structure of a murine T cell receptor (TCR) Valpha domain ("Valpha85.33"; AV11S5-AJ17) to 1.85 A resolution. The Valpha85.33 domain is derived from a TCR that recognizes a type II collagen peptide associated with the murine major histocompatibility complex (MHC) class II molecule...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.2001.4794
更新日期:2001-07-20 00:00:00
abstract::Epistasis is a key factor in evolution since it determines which combinations of mutations provide adaptive solutions and which mutational pathways toward these solutions are accessible by natural selection. There is growing evidence for the pervasiveness of sign epistasis--a complete reversion of mutational effects, ...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2015.05.011
更新日期:2015-07-17 00:00:00
abstract::Bacterial cell shape is dictated by the cell wall, a plastic structure that must adapt to growth and division whilst retaining its function as a selectively permeable barrier. The modulation of cell wall structure is achieved by a variety of enzymatic functions, all of which must be spatially regulated in a precise ma...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2007.07.022
更新日期:2007-09-28 00:00:00
abstract::Recent studies on iron-loaded transferrins have revealed a conformational change upon binding iron due to a domain closure. It has been suggested that the domain closure may be the key for the receptor recognition of the metal loaded transferrin (Grossmann et al., 1992). Small angle X-ray scattering has been used to p...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1006/jmbi.1993.1063
更新日期:1993-02-05 00:00:00
abstract::Single crystals of methanol dehydrogenase (MDH) from Methylobacterium extorquens AM1 have been grown by the vapour diffusion method. These crystals diffract to beyond 2 A resolution and are suitable for X-ray crystallography. They belong to the orthorhombic space group P2(1)2(1)2(1) and have the following unit cell pa...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/0022-2836(92)90509-i
更新日期:1992-11-05 00:00:00
abstract::Na+/H+antiportersare a category of ubiquitous transmembrane proteins with various important physiological roles in almost all living organisms ranging from bacteria to humans. However, the knowledge of novel Na+/H+antiporters remains to be broadened, and the functional roles ofoligomerization in theseantiportershave n...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2020.166730
更新日期:2021-01-22 00:00:00
abstract::Glycosaminoglycans (GAGs) are related to multiple biological functions and diseases. There is growing evidence that GAG concentration and sulfate content increase with age. The destabilizing mutation A546T in the corneal protein TGFBIp leads to lattice-type corneal dystrophy, but symptoms only appear in the fourth dec...
journal_title:Journal of molecular biology
pub_type: 杂志文章
doi:10.1016/j.jmb.2017.07.014
更新日期:2017-09-01 00:00:00