Dan Xiang
Wenzhou Medical College
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Publication
Featured researches published by Dan Xiang.
Mitochondrial DNA | 2013
Weiming Ai; Xiao Chen; Dan Xiang; Shaobo Chen; Yunyun Chen
We determined the complete mitochondrial genome (mitogenome) of Acrossocheilus wenchowensis. It is the first report of mitogenome in genus Acrossocheilus. The total length of A. wenchowensis is 16,591 bp, consisting of 13 protein-coding genes, 2 rRNA genes, 22 transfer RNA genes and a A+T rich control region. The gene order and transcriptional orientation are similar to most vertebrates. The overall base composition is 31.00% A, 27.70% C, 16.30% G and 25.00% T. The termination-associated sequence and conserved sequence blocks were identified in the control region.
Mitochondrial DNA | 2014
Xiao Chen; Weiming Ai; Dan Xiang; Shaobo Chen
Abstract We determined the complete mitochondrial genome of the red stingray Dasyatis akajei. It is 17,658 bp in length, including 13 protein-coding genes, 2 ribosomal RNA genes, 22 transfer RNA genes and a control region. The gene arrangement and transcriptional direction were the same as those of the typical vertebrate mitogenomes. The overall base composition of the heavy-strand is 28.8% T, 26.8% C, 30.9% A and 13.6% G, with a slight A + T bias of 59.7%. The origin of light-strand replication (OL) was identified between tRNA-Asn and tRNA-Cys genes. The termination-associated sequences (TAS) and the conserved sequence blocks (CSB1-3) were identified in the control region.
Mitochondrial DNA | 2013
Xiao Chen; Weiming Ai; Dan Xiang; Yunyun Chen; Shaobo Chen
The complete mitogenome of the pale-edged stingray (Dasyatis zugei) was first confirmed in this study. The mitogenome is 18,264 bp in length and contains 13 protein-coding genes, 2 rRNAs, 22 tRNAs and 1 control region, with the typical gene order in vertebrates. Similar to nucleotide composition of most vertebrate mitogenomes, the nucleotide composition of the pale-edged stingray demonstrates low G and high A+T components. The control region of the pale-edged stingray is 2523 bp in length, the longest known in Chondrichthyes. The termination-associated sequence and two short conserved blocks (CSB II and CSB III) are found in the control region.
Mitochondrial DNA | 2015
Xiao Chen; Dan Xiang; Weiming Ai; Xiaofang Shi
Abstract The complete mitochondrial genome of the pelagic thresher Alopias pelagicus is first presented in this study. It is 16,692 bp in length and contains the 37 genes and 1 control region with the typical gene order and transcriptional direction in the vertebrates. The overall base composition is 32.1% A, 29.3% T, 25.3% C and 13.3% G. Totally, 27 bp overlaps and 25 bp short intergenic spaces are dispersal in the mitogenome. The tRNA-Ser2 (GCU) cannot be folded into the typical cloverleaf structure because of lacking the dihydrouridine arm. Two start codons (ATG and GTG) and three stop codons (AGG, TAG and TAA/T) were used in the 13 protein-coding genes.
Mitochondrial DNA | 2016
Xiao Chen; Weiming Ai; Dan Xiang; Lianghao Pan; Xiaofang Shi
Abstract The complete mitochondrial genome of the brown guitarfish Rhinobatos schlegelii is presented for the first time in this study. It is 16,780 bp in length, consisting 13 protein-coding genes, 22 tRNA genes, 2 rRNA genes and 1 putative control region with the typical gene order and direction of transcription in vertebrates. The overall base composition is 32.1% A, 26.3% C, 13.2% G and 28.3% T. Two start codon (GTG and ATG) and two stop codon patterns (TAG and TAA/T) were found in protein-coding genes. The 22 tRNA genes ranged from 67 (tRNA-Ser2) to 75 (tRNA-Leu1) bp in length. The origin of L-strand replication (OL) was between tRNA-Asn and tRNA-Cys genes within the WANCY region. The tRNA-Ser2 could not be fold into the typical cloverleaf secondary structure because of the replacement of its dihydrouridine arm by a simple loop. The control region was 1089 bp in length with high A + T content (64.0%).
Mitochondrial DNA | 2016
Xiao Chen; Dan Xiang; Sirachai Arunrugstichai; Ling Cai; Yuziwei Xu
Abstract In this study, the complete mitogenome of mangrove whipray Himantura granulata was first determined. It is 17,657 bp in length and consists 22 tRNA genes, 2 rRNA genes, 13 protein-coding genes and 1 putative control region with the typical gene arrangement and transcriptional orientation in vertebrates. Two start codon patterns and two stop codon patterns were found in the protein-coding genes. The tRNA-Ser2 (GCU) could not form the typical clover-leafs structure for lacking the dihydrouridine arm. The control region is 1914 bp in length with poor G (14.9%) and high A + T (59.1%) content.
Mitochondrial DNA | 2015
Xiao Chen; Dan Xiang; Yuziwei Xu; Xiaofang Shi
Abstract The complete mitochondrial genome of the endangered scalloped hammerhead Sphyrna lewini was firstly determined in this study. It is 16,726 bp in length with the typical gene composition and orders in vertebrates. The overall base composition is 31.4% A, 26.3% C, 13.2% G and 29.1% T. Two start codon (ATG and GTG) and three stop codon (TAG, AGA and TAA/TA/T) patterns were found in protein-coding genes. Except for the tRNA-Ser2, the remaining 21 tRNAs can be folded into the typical cloverleaf structure. The control region possess the highest A + T content (66.1%) and lowest G content (12.6%) among all mitochondrial partitions.
Mitochondrial DNA | 2015
Xiao Chen; Min Liu; Dan Xiang; Weiming Ai
Abstract The complete mitochondrial genome of the Japanese wobbegong Orectolobus japonicus was presented in this study. It is 16,706 bp in length with the typical gene composition and arrangement in the mitochondrial genome of vertebrates. The overall base composition is 32.6% A, 24.0% C, 13.3% G and 30.1% T. Two start codons (ATG and GTG) and two stop codons (TAG and TAA) were found in protein-coding genes. The tRNA-Ser2 lacks the dihydrouridine arm and cannot be folded into a typical cloverleaf structure. One termination associated sequence (TAS) and three conserved sequence blocks (CSB1-3) were found in the control region.
Mitochondrial DNA | 2014
Xiao Chen; Junqi Yu; Saile Zhang; Wenyong Ding; Dan Xiang
Abstract The tiger shark Galeocerdo cuvier is the only member of the genus Galeocerdo. The complete mitochondrial genome of G. cuvier is presented for the first time in this study. The gene composition and arrangement in the mitogenome of G. cuvier is identical to most animal mitogenome. There are 22 bp short noncoding sequences and 44 bp overlaps in the mitogenome. The overall base composition is 31.8% A, 23.9% C, 13.0% G and 31.3% T. The dihydrouridine arm of tRNA-Ser2 was replaced by a simple loop and the other tRNAs could be folded into the typical cloverleaf structure.
Mitochondrial DNA | 2015
Xiao Chen; Dan Xiang; Weiming Ai; Xiaofang Shi
Abstract In this study, we first presented the complete mitochondrial genome of the blue shark Prionace Glauca, a pelagic and oceanic species. It is 16,705 bp in length and contains 2 rRNA genes, 22 tRNA genes, 13 protein-coding genes and 1 putative control region. The overall base composition is 31.6% A, 24.4% C, 13.1% G and 30.9% T. Overlaps and short inter-genic spaces are located in the genome. The tRNA-Ser2 loses the dihydrouridine arm and cannot be folded into the typical clover-leaf secondary structure. Two start codons (GTG and ATG) with two stop codons (TAG and TAA) or with one incomplete stop codon (T) are found in the 13 protein-coding genes. The control region contains high A + T (69.9%) and low G (12.0%).
