Myrrophis chinensis

Chinese water snake

Maximum lifespan

4.2 yr

AnAge record

mtDNA size

17,302 bp

RefSeq NC_072633.1

GC content

41.97%

Whole genome

Non-coding

2,230 bp

D-loop 2,180 bp

Where Chinese water snake sits among 2,335 species

Whole-genome GC content against maximum lifespan. Chinese water snake has the 2,074th longest lifespan of them.

This species
Other reptiles
Other classes

Plot other mtDNA features with this species highlighted

Base composition

Whole genome17,302 bp

GC skew (G − C) / (G + C): −0.368
AT skew (A − T) / (A + T): +0.145

Life history

Maximum lifespan: 4.2 years

Lifespan from AnAge · AnAge record

About this record

Lifespan source: AnAge build 15
Based on: an animal in captivity
Data quality: acceptable, small sample
Licence: Free to use, subject to the Human Ageing Genomic Resources conditions of use
Status: New in build 2
In the database since: build 2 (2026-11-13)

Every change against the 2015 build is in the changelog download.

Composition by region

Reference (L) strand as deposited in RefSeq

Whole genome17,302 bp

Protein-coding11,271 bp

12S rRNA922 bp

16S rRNA1,482 bp

All tRNA1,409 bp

D-loop2,180 bp

Genes and regions

Select a column to sort; select a gene to compare it across species

Base composition of Myrrophis chinensis genes

ND1NADH dehydrogenase subunit 1	964 bp	33.0%	24.7%	11.0%	31.3%	42.32%	−0.480	+0.144
ND2NADH dehydrogenase subunit 2	1,030 bp	35.5%	22.3%	10.1%	32.0%	42.14%	−0.521	+0.228
COX1Cytochrome c oxidase subunit I	1,602 bp	28.8%	26.5%	15.9%	28.7%	44.63%	−0.287	+0.042
COX2Cytochrome c oxidase subunit II	685 bp	33.6%	21.9%	15.9%	28.6%	44.53%	−0.285	+0.211
ATP8ATP synthase F0 subunit 8	162 bp	42.0%	24.1%	7.4%	26.5%	33.95%	−0.564	+0.271
ATP6ATP synthase F0 subunit 6	681 bp	33.8%	27.3%	10.1%	28.8%	38.91%	−0.479	+0.106
COX3Cytochrome c oxidase subunit III	784 bp	31.8%	24.9%	15.8%	27.6%	43.37%	−0.271	+0.122
ND3NADH dehydrogenase subunit 3	343 bp	31.2%	26.5%	11.1%	31.2%	42.27%	−0.476	+0.081
ND4LNADH dehydrogenase subunit 4L	291 bp	35.1%	28.2%	10.7%	26.1%	36.77%	−0.421	+0.109
ND4NADH dehydrogenase subunit 4	1,337 bp	32.3%	24.8%	11.2%	31.6%	42.86%	−0.476	+0.131
ND5NADH dehydrogenase subunit 5	1,785 bp	35.8%	24.1%	9.7%	30.4%	40.06%	−0.516	+0.194
ND6NADH dehydrogenase subunit 6	507 bp	47.5%	12.8%	6.7%	32.9%	39.65%	−0.662	+0.575
CYTBCytochrome b	1,117 bp	30.1%	26.6%	11.0%	32.3%	43.33%	−0.492	+0.062
12S rRNA12S ribosomal RNA	922 bp	35.9%	18.4%	18.3%	27.3%	45.66%	−0.197	+0.321
16S rRNA16S ribosomal RNA	1,482 bp	38.7%	21.1%	16.3%	23.9%	40.22%	−0.188	+0.296
D-loopControl region (D-loop)	2,180 bp	27.7%	32.4%	14.1%	25.9%	39.95%	−0.295	−0.079

Codon usage

Counts per codon, darker is more frequent

Gene

3,760 codons in all protein-coding genes. Grouped with the Vertebrate mitochondrial code (NCBI table 2).

Phe F5.5%

UUU91

UUC117

Leu L15.5%

UUA64

UUG19

CUU90

CUC95

CUA281

CUG34

Ile I8.6%

AUU125

AUC198

Met M6.6%

AUA213

AUG36

Val V4.6%

GUU32

GUC42

GUA71

GUG28

Ser S7.4%

UCU36

UCC71

UCA112

UCG7

AGU13

AGC40

Pro P5.1%

CCU14

CCC48

CCA116

CCG14

Thr T11.1%

ACU51

ACC157

ACA197

ACG14

Ala A6.3%

GCU29

GCC99

GCA99

GCG8

Tyr Y2.7%

UAU37

UAC63

His H3.0%

CAU24

CAC87

Gln Q2.3%

CAA80

CAG7

Asn N3.8%

AAU34

AAC110

Lys K2.7%

AAA93

AAG8

Asp D1.5%

GAU11

GAC47

Glu E2.6%

GAA79

GAG19

Cys C0.9%

UGU16

UGC17

Trp W2.6%

UGA82

UGG16

Arg R1.8%

CGU7

CGC8

CGA45

CGG6

Gly G5.2%

GGU32

GGC59

GGA72

GGG34

Stop 0.2%

UAA4

UAG0

AGA1

AGG1

Genome map

39 annotated features in NC_072633.1

Hover, tap or tab to a feature to see its position, length, strand and GC content. Genes and rRNAs open their own pages.

Protein-coding13
rRNA2
tRNA22
D-loop2

Outer ring: + strand, arrows run clockwise. Inner ring: − strand.
Middle ring: GC% of each gene against the whole genome (42.0%, dashed): out is GC-richer, in is AT-richer (full height = 6 points).

All 39 features as a table

Annotated features of Myrrophis chinensis (NC_072633.1)
Feature	Type	Start	End	Length	Strand	GC
tRNA-Phe	Transfer RNA	1	61	61 bp	+	–
12S rRNA	Ribosomal RNA	62	983	922 bp	+	45.7%
tRNA-Val	Transfer RNA	984	1,047	64 bp	+	–
16S rRNA	Ribosomal RNA	1,048	2,529	1,482 bp	+	40.2%
ND1	Protein-coding gene	2,530	3,493	964 bp	+	42.3%
tRNA-Ile	Transfer RNA	3,494	3,557	64 bp	+	–
D-loop	Control region	3,558	4,668	1,111 bp	–	40.0%
tRNA-Leu (UUR)	Transfer RNA	4,669	4,741	73 bp	+	–
tRNA-Gln	Transfer RNA	4,742	4,811	70 bp	−	–
tRNA-Met	Transfer RNA	4,813	4,874	62 bp	+	–
ND2	Protein-coding gene	4,875	5,904	1,030 bp	+	42.1%
tRNA-Trp	Transfer RNA	5,905	5,969	65 bp	+	–
tRNA-Ala	Transfer RNA	5,972	6,036	65 bp	−	–
tRNA-Asn	Transfer RNA	6,037	6,109	73 bp	−	–
tRNA-Cys	Transfer RNA	6,146	6,204	59 bp	−	–
tRNA-Tyr	Transfer RNA	6,205	6,264	60 bp	−	–
COX1	Protein-coding gene	6,266	7,867	1,602 bp	+	44.6%
tRNA-Ser (UCN)	Transfer RNA	7,858	7,924	67 bp	−	–
tRNA-Asp	Transfer RNA	7,925	7,987	63 bp	+	–
COX2	Protein-coding gene	7,988	8,672	685 bp	+	44.5%
tRNA-Lys	Transfer RNA	8,673	8,733	61 bp	+	–
ATP8	Protein-coding gene	8,735	8,896	162 bp	+	34.0%
ATP6	Protein-coding gene	8,887	9,567	681 bp	+	38.9%
COX3	Protein-coding gene	9,567	10,350	784 bp	+	43.4%
tRNA-Gly	Transfer RNA	10,351	10,411	61 bp	+	–
ND3	Protein-coding gene	10,412	10,754	343 bp	+	42.3%
tRNA-Arg	Transfer RNA	10,755	10,817	63 bp	+	–
ND4L	Protein-coding gene	10,818	11,108	291 bp	+	36.8%
ND4	Protein-coding gene	11,108	12,444	1,337 bp	+	42.9%
tRNA-His	Transfer RNA	12,445	12,509	65 bp	+	–
tRNA-Ser (AGY)	Transfer RNA	12,510	12,566	57 bp	+	–
tRNA-Leu (CUN)	Transfer RNA	12,564	12,634	71 bp	+	–
ND5	Protein-coding gene	12,635	14,419	1,785 bp	+	40.1%
ND6	Protein-coding gene	14,415	14,921	507 bp	−	39.7%
tRNA-Glu	Transfer RNA	14,931	14,992	62 bp	−	–
CYTB	Protein-coding gene	14,991	16,107	1,117 bp	+	43.3%
tRNA-Thr	Transfer RNA	16,108	16,171	64 bp	+	–
tRNA-Pro	Transfer RNA	16,172	16,233	62 bp	−	–
D-loop	Control region	16,234	17,302	1,069 bp	–	40.0%