NDLI: Comparative phylogenetic analysis of genome-wide Mlo gene family members from Glycine max and Arabidopsis thaliana

Content Provider	Springer Nature Link
Author	Deshmukh, Reena Singh, V. K. Singh, B. D.
Copyright Year	2014
Abstract	Powdery mildew locus O (Mlo) gene family is one of the largest seven transmembrane protein-encoding gene families. The Mlo proteins act as negative regulators of powdery mildew resistance and a loss-of-function mutation in Mlo is known to confer broad-spectrum resistance to powdery mildew. In addition, the Mlo gene family members are known to participate in various developmental and biotic and abiotic stress response-related pathways. Therefore, a genome-wide similarity search using the characterized Mlo protein sequences of Arabidopsis thaliana was carried out to identify putative Mlo genes in soybean (Glycine max) genome. This search identified 39 Mlo domain containing protein-encoding genes that were distributed on 15 of the 20 G. max chromosomes. The putative promoter regions of these Mlo genes contained response elements for different external stimuli, including different hormones and abiotic stresses. Of the 39 GmMlo proteins, 35 were rich (8.7–13.1 %) in leucine, while five were serine-rich (9.2–11.9 %). Furthermore, all the GmMlo members were localized in the plasma membrane. Phylogenetic analysis of the GmMlo and the AtMlo proteins classified them into three main clusters, and the cluster I comprised two sub-clusters. Multiple sequence alignment visualized the location of seven transmembrane domains, and a conserved CaM-binding domain. Some of the GmMlo proteins (GmMlo10, 20, 22, 23, 32, 36, 37) contained less than seven transmembrane domains. The motif analysis yielded 27 motifs; out of these, motif 2, the only motif present in all the GmMlos, was highly conserved and three amino acid residues were essentially invariant. Five of the GmMlo members were much smaller in size; presumably they originated through deletion following a gene duplication event. The presence of a large number of GmMlo members in the G. max genome may be due to its paleopolyploid nature and the large genome size as compared to that of Arabidopsis. The findings of this study may further help in characterization and isolation of individual GmMlo members.
Starting Page	345
Ending Page	359
Page Count	15
File Format	PDF
ISSN	16174615
Journal	Molecular and General Genetics MGG
Volume Number	289
Issue Number	3
e-ISSN	16174623
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-01-28
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Comparative phylogeny Glycine max Mlo gene family Powdery mildew Arabidopsis thaliana Cell Biology Biochemistry Microbial Genetics and Genomics Plant Genetics & Genomics Animal Genetics and Genomics
Content Type	Text
Resource Type	Article
Subject	Genetics Medicine Molecular Biology

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