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Comparison of envelope-related genes in unicellular and filamentous cyanobacteria.

Yang Y, Qin S, Zhao F, Chi X, Zhang X - Comp. Funct. Genomics (2007)

Bottom Line: Hundreds of envelope biogenesis genes were divided into 5 major groups and annotated according to their conserved domains and phylogenetic profiles.Compared to unicellular species, the gene numbers of filamentous cyanobacteria expanded due to genome enlargement effect, but only few gene families amplified disproportionately, such as those encoding waaG and glycosyl transferase 2.Comparison of envelope genes among various species suggested that the significant variance of certain cyanobacterial envelope biogenesis genes should be the response to their environmental adaptation, which might be also related to the emergence of filamentous shapes with some new functions.

View Article: PubMed Central - PubMed

Affiliation: Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.

ABSTRACT
To elucidate the evolution of cyanobacterial envelopes and the relation between gene content and environmental adaptation, cell envelope structures and components of unicellular and filamentous cyanobacteria were analyzed in comparative genomics. Hundreds of envelope biogenesis genes were divided into 5 major groups and annotated according to their conserved domains and phylogenetic profiles. Compared to unicellular species, the gene numbers of filamentous cyanobacteria expanded due to genome enlargement effect, but only few gene families amplified disproportionately, such as those encoding waaG and glycosyl transferase 2. Comparison of envelope genes among various species suggested that the significant variance of certain cyanobacterial envelope biogenesis genes should be the response to their environmental adaptation, which might be also related to the emergence of filamentous shapes with some new functions.

No MeSH data available.


Related in: MedlinePlus

Multiple sequence alignments of homologous genes encoding glycosyl transferase 2 (GT2) domains in Trichodesmium erythraeum IMS101 (27 genes) and Anabaena sp. PCC 7120 (36 genes). Only most conservedareas were shown. The number following the genus name was the gene accession in IMG database. NCBI accession and other information of genes were provided in Tables 3 and 4.
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fig2: Multiple sequence alignments of homologous genes encoding glycosyl transferase 2 (GT2) domains in Trichodesmium erythraeum IMS101 (27 genes) and Anabaena sp. PCC 7120 (36 genes). Only most conservedareas were shown. The number following the genus name was the gene accession in IMG database. NCBI accession and other information of genes were provided in Tables 3 and 4.

Mentions: During the progress from unicellular to filamentous cyanobacteria, the percentage of EBR genes increased clearly but unevenly in some particular genes. Most extra genes of filamentous species belonged to the family encoding glycosyl transferase 2 that involved in many metabolic processes, mainly in the cellulose biosynthesis [24]. The common conserved domain Glycos_transf_2 was detected for 36 times in Anabaena sp. PCC 7120, and 27 in Trichodesmium erythraeum IMS101, as shown in Tables 3 and 4 and Figure 2, whereas it was only 8 times in Prochlorococcus marinus MED4 and 14 times in Synechocystis sp. PCC 6803. It is believed that certain member in the family glycosyl transferase 2 was a key enzyme synthesizing cellulose in filamentous cyanobacteria.


Comparison of envelope-related genes in unicellular and filamentous cyanobacteria.

Yang Y, Qin S, Zhao F, Chi X, Zhang X - Comp. Funct. Genomics (2007)

Multiple sequence alignments of homologous genes encoding glycosyl transferase 2 (GT2) domains in Trichodesmium erythraeum IMS101 (27 genes) and Anabaena sp. PCC 7120 (36 genes). Only most conservedareas were shown. The number following the genus name was the gene accession in IMG database. NCBI accession and other information of genes were provided in Tables 3 and 4.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC2211374&req=5

fig2: Multiple sequence alignments of homologous genes encoding glycosyl transferase 2 (GT2) domains in Trichodesmium erythraeum IMS101 (27 genes) and Anabaena sp. PCC 7120 (36 genes). Only most conservedareas were shown. The number following the genus name was the gene accession in IMG database. NCBI accession and other information of genes were provided in Tables 3 and 4.
Mentions: During the progress from unicellular to filamentous cyanobacteria, the percentage of EBR genes increased clearly but unevenly in some particular genes. Most extra genes of filamentous species belonged to the family encoding glycosyl transferase 2 that involved in many metabolic processes, mainly in the cellulose biosynthesis [24]. The common conserved domain Glycos_transf_2 was detected for 36 times in Anabaena sp. PCC 7120, and 27 in Trichodesmium erythraeum IMS101, as shown in Tables 3 and 4 and Figure 2, whereas it was only 8 times in Prochlorococcus marinus MED4 and 14 times in Synechocystis sp. PCC 6803. It is believed that certain member in the family glycosyl transferase 2 was a key enzyme synthesizing cellulose in filamentous cyanobacteria.

Bottom Line: Hundreds of envelope biogenesis genes were divided into 5 major groups and annotated according to their conserved domains and phylogenetic profiles.Compared to unicellular species, the gene numbers of filamentous cyanobacteria expanded due to genome enlargement effect, but only few gene families amplified disproportionately, such as those encoding waaG and glycosyl transferase 2.Comparison of envelope genes among various species suggested that the significant variance of certain cyanobacterial envelope biogenesis genes should be the response to their environmental adaptation, which might be also related to the emergence of filamentous shapes with some new functions.

View Article: PubMed Central - PubMed

Affiliation: Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.

ABSTRACT
To elucidate the evolution of cyanobacterial envelopes and the relation between gene content and environmental adaptation, cell envelope structures and components of unicellular and filamentous cyanobacteria were analyzed in comparative genomics. Hundreds of envelope biogenesis genes were divided into 5 major groups and annotated according to their conserved domains and phylogenetic profiles. Compared to unicellular species, the gene numbers of filamentous cyanobacteria expanded due to genome enlargement effect, but only few gene families amplified disproportionately, such as those encoding waaG and glycosyl transferase 2. Comparison of envelope genes among various species suggested that the significant variance of certain cyanobacterial envelope biogenesis genes should be the response to their environmental adaptation, which might be also related to the emergence of filamentous shapes with some new functions.

No MeSH data available.


Related in: MedlinePlus