Sistrurus catenatus

Massasauga

Maximum lifespan

20 yr

AnAge record

mtDNA size

17,245 bp

RefSeq NC_071935.1

GC content

41.72%

Whole genome

Non-coding

2,344 bp

D-loop 2,049 bp

Where Massasauga sits among 2,335 species

Whole-genome GC content against maximum lifespan. Massasauga has the 916th longest lifespan of them.

This species
Other reptiles
Other classes

Plot other mtDNA features with this species highlighted

Base composition

Whole genome17,245 bp

GC skew (G − C) / (G + C): −0.368
AT skew (A − T) / (A + T): +0.097

Life history

Maximum lifespan: 20 years
Adult weight: 384 g
Female sexual maturity: 3 years
Male sexual maturity: 3 years
Gestation or incubation: 107 days
Litter or clutch size: 8

Lifespan from AnAge · AnAge record · other traits from AnAge build 15 (HAGRID 03651)

About this record

Lifespan source: AnAge build 15
Based on: an animal in captivity
Data quality: acceptable, medium 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 genome17,245 bp

Protein-coding11,284 bp

12S rRNA776 bp

16S rRNA1,426 bp

All tRNA1,427 bp

D-loop2,049 bp

Genes and regions

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

Base composition of Sistrurus catenatus genes

ND1NADH dehydrogenase subunit 1	961 bp	30.4%	27.7%	12.1%	29.9%	41.94%	−0.424	+0.047
ND2NADH dehydrogenase subunit 2	1,029 bp	34.1%	24.2%	9.3%	32.4%	41.69%	−0.552	+0.170
COX1Cytochrome c oxidase subunit I	1,602 bp	27.2%	28.6%	16.8%	27.5%	44.26%	−0.241	−0.026
COX2Cytochrome c oxidase subunit II	685 bp	32.3%	22.0%	15.9%	29.8%	45.69%	−0.304	+0.188
ATP8ATP synthase F0 subunit 8	165 bp	41.2%	21.8%	5.5%	31.5%	36.97%	−0.705	+0.308
ATP6ATP synthase F0 subunit 6	681 bp	32.3%	29.8%	9.1%	28.8%	37.89%	−0.519	+0.040
COX3Cytochrome c oxidase subunit III	784 bp	29.8%	25.6%	15.1%	29.5%	44.52%	−0.324	+0.076
ND3NADH dehydrogenase subunit 3	343 bp	32.7%	28.6%	11.4%	27.4%	38.78%	−0.414	+0.067
ND4LNADH dehydrogenase subunit 4L	291 bp	32.0%	27.5%	11.0%	29.6%	40.55%	−0.458	+0.075
ND4NADH dehydrogenase subunit 4	1,338 bp	32.7%	26.2%	10.6%	30.4%	41.03%	−0.483	+0.110
ND5NADH dehydrogenase subunit 5	1,785 bp	34.9%	26.0%	9.7%	29.4%	39.10%	−0.501	+0.146
ND6NADH dehydrogenase subunit 6	522 bp	43.3%	14.0%	6.5%	36.2%	42.72%	−0.695	+0.512
CYTBCytochrome b	1,114 bp	29.2%	27.7%	11.1%	32.0%	43.09%	−0.483	+0.025
12S rRNA12S ribosomal RNA	776 bp	35.4%	19.3%	18.4%	26.8%	45.23%	−0.185	+0.294
16S rRNA16S ribosomal RNA	1,426 bp	37.3%	22.5%	16.4%	23.8%	40.18%	−0.183	+0.247
D-loopControl region (D-loop)	2,049 bp	24.7%	33.7%	14.3%	27.2%	41.58%	−0.310	−0.153

Codon usage

Counts per codon, darker is more frequent

Gene

3,765 codons in all protein-coding genes. Grouped with the Vertebrate mitochondrial code (NCBI table 2).

Phe F5.6%

UUU109

UUC102

Leu L15.6%

UUA104

UUG20

CUU101

CUC86

CUA240

CUG36

Ile I8.8%

AUU153

AUC179

Met M6.2%

AUA195

AUG39

Val V4.6%

GUU37

GUC41

GUA62

GUG32

Ser S6.6%

UCU50

UCC69

UCA84

UCG5

AGU15

AGC26

Pro P5.6%

CCU40

CCC77

CCA78

CCG15

Thr T11.2%

ACU58

ACC169

ACA187

ACG6

Ala A6.5%

GCU33

GCC104

GCA96

GCG10

Tyr Y3.0%

UAU49

UAC64

His H2.7%

CAU21

CAC79

Gln Q2.7%

CAA80

CAG20

Asn N3.9%

AAU40

AAC106

Lys K2.7%

AAA85

AAG18

Asp D1.5%

GAU16

GAC42

Glu E2.6%

GAA85

GAG14

Cys C0.7%

UGU10

UGC16

Trp W2.5%

UGA75

UGG20

Arg R1.6%

CGU6

CGC9

CGA39

CGG6

Gly G5.3%

GGU30

GGC61

GGA66

GGG42

Stop 0.2%

UAA4

UAG2

AGA2

AGG0

Genome map

39 annotated features in NC_071935.1

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 (41.7%, dashed): out is GC-richer, in is AT-richer (full height = 6 points).

All 39 features as a table

Annotated features of Sistrurus catenatus (NC_071935.1)
Feature	Type	Start	End	Length	Strand	GC
tRNA-Phe	Transfer RNA	1	64	64 bp	+	–
12S rRNA	Ribosomal RNA	123	898	776 bp	+	45.2%
tRNA-Val	Transfer RNA	978	1,040	63 bp	+	–
16S rRNA	Ribosomal RNA	1,078	2,503	1,426 bp	+	40.2%
ND1	Protein-coding gene	2,525	3,485	961 bp	+	41.9%
tRNA-Ile	Transfer RNA	3,486	3,554	69 bp	+	–
tRNA-Pro	Transfer RNA	3,559	3,621	63 bp	−	–
D-loop	Control region	3,623	4,648	1,026 bp	–	41.6%
tRNA-Leu (UUR)	Transfer RNA	4,649	4,721	73 bp	+	–
tRNA-Gln	Transfer RNA	4,722	4,791	70 bp	−	–
tRNA-Met	Transfer RNA	4,792	4,854	63 bp	+	–
ND2	Protein-coding gene	4,855	5,883	1,029 bp	+	41.7%
tRNA-Trp	Transfer RNA	5,882	5,947	66 bp	+	–
tRNA-Ala	Transfer RNA	5,950	6,013	64 bp	−	–
tRNA-Asn	Transfer RNA	6,014	6,087	74 bp	−	–
tRNA-Cys	Transfer RNA	6,123	6,182	60 bp	−	–
tRNA-Tyr	Transfer RNA	6,183	6,243	61 bp	−	–
COX1	Protein-coding gene	6,245	7,846	1,602 bp	+	44.3%
tRNA-Ser (UCN)	Transfer RNA	7,837	7,904	68 bp	−	–
tRNA-Asp	Transfer RNA	7,905	7,967	63 bp	+	–
COX2	Protein-coding gene	7,969	8,653	685 bp	+	45.7%
tRNA-Lys	Transfer RNA	8,654	8,717	64 bp	+	–
ATP8	Protein-coding gene	8,718	8,882	165 bp	+	37.0%
ATP6	Protein-coding gene	8,873	9,553	681 bp	+	37.9%
COX3	Protein-coding gene	9,553	10,336	784 bp	+	44.5%
tRNA-Gly	Transfer RNA	10,337	10,397	61 bp	+	–
ND3	Protein-coding gene	10,398	10,740	343 bp	+	38.8%
tRNA-Arg	Transfer RNA	10,741	10,804	64 bp	+	–
ND4L	Protein-coding gene	10,805	11,095	291 bp	+	40.6%
ND4	Protein-coding gene	11,095	12,432	1,338 bp	+	41.0%
tRNA-His	Transfer RNA	12,433	12,494	62 bp	+	–
tRNA-Ser (AGY)	Transfer RNA	12,495	12,550	56 bp	+	–
tRNA-Leu (CUN)	Transfer RNA	12,551	12,622	72 bp	+	–
ND5	Protein-coding gene	12,624	14,408	1,785 bp	+	39.1%
ND6	Protein-coding gene	14,405	14,926	522 bp	−	42.7%
tRNA-Glu	Transfer RNA	14,927	14,988	62 bp	−	–
CYTB	Protein-coding gene	14,989	16,102	1,114 bp	+	43.1%
tRNA-Thr	Transfer RNA	16,103	16,167	65 bp	+	–
D-loop	Control region	16,223	17,245	1,023 bp	–	41.6%