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  1. Article ; Online: Structural Determinants of Yeast Protein-Protein Interaction Interface Evolution at the Residue Level.

    Pollet, Léah / Lambourne, Luke / Xia, Yu

    Journal of molecular biology

    2022  Volume 434, Issue 19, Page(s) 167750

    Abstract: Interfaces of contact between proteins play important roles in determining the proper structure and function of protein-protein interactions (PPIs). Therefore, to fully understand PPIs, we need to better understand the evolutionary design principles of ... ...

    Abstract Interfaces of contact between proteins play important roles in determining the proper structure and function of protein-protein interactions (PPIs). Therefore, to fully understand PPIs, we need to better understand the evolutionary design principles of PPI interfaces. Previous studies have uncovered that interfacial sites are more evolutionarily conserved than other surface protein sites. Yet, little is known about the nature and relative importance of evolutionary constraints in PPI interfaces. Here, we explore constraints imposed by the structure of the microenvironment surrounding interfacial residues on residue evolutionary rate using a large dataset of over 700 structural models of baker's yeast PPIs. We find that interfacial residues are, on average, systematically more conserved than all other residues with a similar degree of total burial as measured by relative solvent accessibility (RSA). Besides, we find that RSA of the residue when the PPI is formed is a better predictor of interfacial residue evolutionary rate than RSA in the monomer state. Furthermore, we investigate four structure-based measures of residue interfacial involvement, including change in RSA upon binding (ΔRSA), number of residue-residue contacts across the interface, and distance from the center or the periphery of the interface. Integrated modeling for evolutionary rate prediction in interfaces shows that ΔRSA plays a dominant role among the four measures of interfacial involvement, with minor, but independent contributions from other measures. These results yield insight into the evolutionary design of interfaces, improving our understanding of the role that structure plays in the molecular evolution of PPIs at the residue level.
    MeSH term(s) Evolution, Molecular ; Protein Binding ; Protein Interaction Maps ; Proteome ; Saccharomyces cerevisiae/genetics ; Saccharomyces cerevisiae/metabolism ; Saccharomyces cerevisiae Proteins/metabolism
    Chemical Substances Proteome ; Saccharomyces cerevisiae Proteins
    Language English
    Publishing date 2022-07-16
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 80229-3
    ISSN 1089-8638 ; 0022-2836
    ISSN (online) 1089-8638
    ISSN 0022-2836
    DOI 10.1016/j.jmb.2022.167750
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Conference proceedings ; Online: Research in goat productivity in tropical Africa

    Lambourne, L.J.

    2014  

    Abstract: Reports research activities in goat productivity in tropical Africa. Discusses in detail the economic importance of goats; Development of breeds suited to various ecological zones; production systems and productivity & limitations; location & topics of ... ...

    Abstract Reports research activities in goat productivity in tropical Africa. Discusses in detail the economic importance of goats; Development of breeds suited to various ecological zones; production systems and productivity & limitations; location & topics of current research activity, and present and future needs in goat research.
    Keywords tropical africa ; goats ; research ; productivity ; zootechny ; livestock production ; economic aspects ; humid zones ; highlands
    Language English
    Publishing date 2014-10-31T06:21:59Z
    Publisher Australian Centre for International Agricultural Research
    Publishing country fr
    Document type Conference proceedings ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Conference proceedings ; Online: The contribution of satellite imagery to an early warning systems

    Lambourne, L.J.

    2014  

    Keywords remote sensing ; precipitation ; agriculture ; drought
    Language English
    Publishing date 2014-10-31T06:22:08Z
    Publisher Relief and Rehabilitation Commission
    Publishing country fr
    Document type Conference proceedings ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: (with research data) Upon Accounting for the Impact of Isoenzyme Loss, Gene Deletion Costs Anticorrelate with Their Evolutionary Rates.

    Jacobs, Christopher / Lambourne, Luke / Xia, Yu / Segrè, Daniel

    PloS one

    2017  Volume 12, Issue 1, Page(s) e0170164

    Abstract: System-level metabolic network models enable the computation of growth and metabolic phenotypes from an organism's genome. In particular, flux balance approaches have been used to estimate the contribution of individual metabolic genes to organismal ... ...

    Abstract System-level metabolic network models enable the computation of growth and metabolic phenotypes from an organism's genome. In particular, flux balance approaches have been used to estimate the contribution of individual metabolic genes to organismal fitness, offering the opportunity to test whether such contributions carry information about the evolutionary pressure on the corresponding genes. Previous failure to identify the expected negative correlation between such computed gene-loss cost and sequence-derived evolutionary rates in Saccharomyces cerevisiae has been ascribed to a real biological gap between a gene's fitness contribution to an organism "here and now" and the same gene's historical importance as evidenced by its accumulated mutations over millions of years of evolution. Here we show that this negative correlation does exist, and can be exposed by revisiting a broadly employed assumption of flux balance models. In particular, we introduce a new metric that we call "function-loss cost", which estimates the cost of a gene loss event as the total potential functional impairment caused by that loss. This new metric displays significant negative correlation with evolutionary rate, across several thousand minimal environments. We demonstrate that the improvement gained using function-loss cost over gene-loss cost is explained by replacing the base assumption that isoenzymes provide unlimited capacity for backup with the assumption that isoenzymes are completely non-redundant. We further show that this change of the assumption regarding isoenzymes increases the recall of epistatic interactions predicted by the flux balance model at the cost of a reduction in the precision of the predictions. In addition to suggesting that the gene-to-reaction mapping in genome-scale flux balance models should be used with caution, our analysis provides new evidence that evolutionary gene importance captures much more than strict essentiality.
    MeSH term(s) Epistasis, Genetic ; Evolution, Molecular ; Gene Deletion ; Genes, Fungal ; Isoenzymes/genetics ; Saccharomyces cerevisiae/enzymology ; Saccharomyces cerevisiae/genetics
    Chemical Substances Isoenzymes
    Language English
    Publishing date 2017-01-20
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2267670-3
    ISSN 1932-6203 ; 1932-6203
    ISSN (online) 1932-6203
    ISSN 1932-6203
    DOI 10.1371/journal.pone.0170164
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Ruminant assay for rapidly estimating plant residue decomposability in the field

    Tian, G. / Kang, B. / Lambourne, L.J.

    2019  

    Abstract: Field litterbag decomposition study, through widely accepted for examining decomposition of plant residues, is time consuming, as it requires several months to complete. An experiment was conducted to explore the possibility to introduce ruminant ... ...

    Abstract Field litterbag decomposition study, through widely accepted for examining decomposition of plant residues, is time consuming, as it requires several months to complete. An experiment was conducted to explore the possibility to introduce ruminant nylonbag assay which only takes 3-4 days, to plant residue decomposition studies for agricultural purpose. Results showed decomposability of plant residues, measured using the ruminant nylon bag significantly correlated with those using the litterbags, indicating that the ruminant nylonbag assay, widely used for studying herbage breakdown in animal nutrition research, can be used for rapidly estimating the decomposability of plant residues in the field.
    Keywords fields ; plant residues ; herbage crops ; decomposition ; ruminants
    Language English
    Publishing date 2019-10-03T14:30:52Z
    Publishing country fr
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: Domain-based prediction of the human isoform interactome provides insights into the functional impact of alternative splicing.

    Ghadie, Mohamed Ali / Lambourne, Luke / Vidal, Marc / Xia, Yu

    PLoS computational biology

    2017  Volume 13, Issue 8, Page(s) e1005717

    Abstract: Alternative splicing is known to remodel protein-protein interaction networks ("interactomes"), yet large-scale determination of isoform-specific interactions remains challenging. We present a domain-based method to predict the isoform interactome from ... ...

    Abstract Alternative splicing is known to remodel protein-protein interaction networks ("interactomes"), yet large-scale determination of isoform-specific interactions remains challenging. We present a domain-based method to predict the isoform interactome from the reference interactome. First, we construct the domain-resolved reference interactome by mapping known domain-domain interactions onto experimentally-determined interactions between reference proteins. Then, we construct the isoform interactome by predicting that an isoform loses an interaction if it loses the domain mediating the interaction. Our prediction framework is of high-quality when assessed by experimental data. The predicted human isoform interactome reveals extensive network remodeling by alternative splicing. Protein pairs interacting with different isoforms of the same gene tend to be more divergent in biological function, tissue expression, and disease phenotype than protein pairs interacting with the same isoforms. Our prediction method complements experimental efforts, and demonstrates that integrating structural domain information with interactomes provides insights into the functional impact of alternative splicing.
    MeSH term(s) Alternative Splicing/genetics ; Alternative Splicing/physiology ; Computational Biology/methods ; Humans ; Models, Statistical ; Neoplasms/genetics ; Protein Interaction Mapping/methods ; Protein Interaction Maps/genetics ; Protein Interaction Maps/physiology ; Protein Isoforms/chemistry ; Protein Isoforms/genetics ; Protein Isoforms/physiology
    Chemical Substances Protein Isoforms
    Language English
    Publishing date 2017-08-28
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2193340-6
    ISSN 1553-7358 ; 1553-734X
    ISSN (online) 1553-7358
    ISSN 1553-734X
    DOI 10.1371/journal.pcbi.1005717
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Protein Interactomics by Two-Hybrid Methods.

    Choi, Soon Gang / Richardson, Aaron / Lambourne, Luke / Hill, David E / Vidal, Marc

    Methods in molecular biology (Clifton, N.J.)

    2018  Volume 1794, Page(s) 1–14

    Abstract: Comprehensive identification of direct, physical interactions between biological macromolecules, such as protein-protein, protein-DNA, and protein-RNA interactions, is critical for our understanding of the function of gene products as well as the global ... ...

    Abstract Comprehensive identification of direct, physical interactions between biological macromolecules, such as protein-protein, protein-DNA, and protein-RNA interactions, is critical for our understanding of the function of gene products as well as the global organization and interworkings of various molecular machines within the cell. The accurate and comprehensive detection of direct interactions, however, remains a huge challenge due to the inherent structural complexity arising from various post-transcriptional and translational modifications coupled with huge heterogeneity in concentration, affinity, and subcellular location differences existing for any interacting molecules. This has created a need for developing multiple orthogonal and complementary assays for detecting various types of biological interactions. In this introduction, we discuss the methods developed for measuring different types of molecular interactions with an emphasis on direct protein-protein interactions, critical issues for generating high-quality interactome datasets, and the insights into biological networks and human diseases that current interaction mapping efforts provide. Further, we will discuss what future might lie ahead for the continued evolution of two-hybrid methods and the role of interactomics for expanding the advancement of biomedical science.
    MeSH term(s) Computational Biology/methods ; Humans ; Protein Interaction Mapping/methods ; Proteins/metabolism ; Proteomics/methods ; Two-Hybrid System Techniques
    Chemical Substances Proteins
    Language English
    Publishing date 2018-05-22
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ISSN 1940-6029
    ISSN (online) 1940-6029
    DOI 10.1007/978-1-4939-7871-7_1
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Book: Japonisme

    Lambourne, Lionel

    cultural crossings between Japan and the West

    2005  

    Author's details Lionel Lambourne
    Keywords Art/Japanese influences ; Art, Japanese ; Civilization, Western/Japanese influences ; Japonism ; Japan
    Language English
    Size 240 S, zahlr. Ill., Kt, 290 mm x 250 mm
    Publisher Phaidon
    Publishing place London u.a.
    Document type Book
    Note Literaturverz. S. 234 - 235
    ISBN 0714841056 ; 9780714847979 ; 9780714841052 ; 0714847976
    Database Former special subject collection: coastal and deep sea fishing

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  9. Book: Japonisme

    Lambourne, Lionel

    cultural crossings between Japan and the West

    2005  

    Author's details Lionel Lambourne
    Keywords Art/Japanese influences ; Art, Japanese ; Civilization, Western/Japanese influences ; Japonism ; Japan
    Language English
    Size 240 S, zahlr. Ill., Kt, 290 mm x 250 mm
    Publisher Phaidon
    Publishing place London u.a.
    Document type Book
    Note Literaturverz. S. 234 - 235
    ISBN 0714841056 ; 9780714847979 ; 9780714841052 ; 0714847976
    Database Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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  10. Conference proceedings ; Online: Productivity improvement and resource conservation in the use of African rangelands

    Butterworth, M.H. / Lambourne, L.J.

    2014  

    Abstract: Looks into the nature of African rangelands, cattle & small stock production/productivity, nutrition limitations to production, improvement of rangeland and conservation of arid range land; presents data on estimated yield of cows in ILCA pastoral ... ...

    Abstract Looks into the nature of African rangelands, cattle & small stock production/productivity, nutrition limitations to production, improvement of rangeland and conservation of arid range land; presents data on estimated yield of cows in ILCA pastoral programmes, production characteristics of sheep and goats, chemical analysis for grasses & browse from s. Ethiopian rangelands, and yield & composition of forage available in Stylosanthes fodder bank in Kaduna during the dry season.
    Keywords arid zones ; rangelands ; resource conservation ; productivity ; livestock production ; range improvement ; cattle ; small ruminants
    Language English
    Publishing date 2014-10-31T06:21:54Z
    Publisher Australian Academy of Science
    Publishing country fr
    Document type Conference proceedings ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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