Didelphis marsupialis

Southern opossum

Maximum lifespan

4.2 yr

AnAge record

mtDNA size

17,157 bp

RefSeq NC_057518.1

GC content

33.57%

Whole genome

Non-coding

1,816 bp

D-loop 1,685 bp

Where Southern opossum sits among 2,335 species

Whole-genome GC content against maximum lifespan. Southern opossum has the 2,072nd longest lifespan of them.

This species
Other mammals
Other classes

Plot other mtDNA features with this species highlighted

Base composition

Whole genome17,157 bp

GC skew (G − C) / (G + C): −0.284
AT skew (A − T) / (A + T): +0.051

Life history

Maximum lifespan: 4.2 years
Adult weight: 1.5 kg
Birth weight: 200 mg
Basal metabolic rate: 3.31 W
Body temperature: 35 °C
Female sexual maturity: 178 days
Male sexual maturity: 240 days
Gestation or incubation: 12 days
Litter or clutch size: 6
Litters per year: 2

Lifespan from AnAge · AnAge record · other traits from AnAge build 15 (HAGRID 02493)

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 genome17,157 bp

Protein-coding11,317 bp

12S rRNA950 bp

16S rRNA1,572 bp

All tRNA1,505 bp

D-loop1,685 bp

Genes and regions

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

Base composition of Didelphis marsupialis genes

ND1NADH dehydrogenase subunit 1	955 bp	32.4%	32.4%	10.8%	24.5%	35.29%	−0.389	0.000
ND2NADH dehydrogenase subunit 2	1,044 bp	35.4%	31.9%	7.4%	25.3%	32.66%	−0.548	+0.053
COX1Cytochrome c oxidase subunit I	1,542 bp	29.0%	34.3%	15.2%	21.5%	36.71%	−0.170	−0.084
COX2Cytochrome c oxidase subunit II	682 bp	33.1%	32.6%	13.6%	20.7%	34.31%	−0.205	+0.009
ATP8ATP synthase F0 subunit 8	210 bp	41.4%	29.0%	5.7%	23.8%	29.52%	−0.613	+0.176
ATP6ATP synthase F0 subunit 6	681 bp	32.9%	33.9%	9.1%	24.1%	33.19%	−0.451	−0.015
COX3Cytochrome c oxidase subunit III	784 bp	29.0%	34.2%	14.5%	22.3%	36.86%	−0.211	−0.083
ND3NADH dehydrogenase subunit 3	346 bp	29.8%	36.1%	10.7%	23.4%	34.10%	−0.373	−0.096
ND4LNADH dehydrogenase subunit 4L	297 bp	32.3%	36.4%	10.8%	20.5%	31.31%	−0.312	−0.059
ND4NADH dehydrogenase subunit 4	1,378 bp	34.9%	31.9%	9.2%	24.0%	33.24%	−0.445	+0.046
ND5NADH dehydrogenase subunit 5	1,800 bp	33.9%	33.0%	9.7%	23.4%	33.06%	−0.415	+0.014
ND6NADH dehydrogenase subunit 6	507 bp	42.6%	25.8%	9.1%	22.5%	31.56%	−0.425	+0.245
CYTBCytochrome b	1,149 bp	31.9%	29.9%	12.2%	26.1%	38.29%	−0.364	+0.032
12S rRNA12S ribosomal RNA	950 bp	36.9%	25.7%	17.1%	20.3%	37.37%	−0.087	+0.180
16S rRNA16S ribosomal RNA	1,572 bp	38.4%	26.1%	15.7%	19.8%	35.50%	−0.115	+0.191
D-loopControl region (D-loop)	1,685 bp	43.1%	33.6%	10.0%	13.3%	23.26%	−0.143	+0.123

Codon usage

Counts per codon, darker is more frequent

Gene

3,790 codons in all protein-coding genes. Grouped with the Vertebrate mitochondrial code (NCBI table 2).

Phe F5.9%

UUU127

UUC98

Leu L15.9%

UUA192

UUG10

CUU113

CUC44

CUA231

CUG11

Ile I10.2%

AUU277

AUC108

Met M6.5%

AUA222

AUG26

Val V4.0%

GUU47

GUC23

GUA74

GUG9

Ser S8.0%

UCU59

UCC57

UCA139

UCG1

AGU18

AGC28

Pro P5.1%

CCU65

CCC38

CCA87

CCG2

Thr T7.7%

ACU82

ACC66

ACA138

ACG6

Ala A6.1%

GCU78

GCC67

GCA87

GCG0

Tyr Y3.8%

UAU88

UAC55

His H2.5%

CAU48

CAC46

Gln Q2.5%

CAA91

CAG4

Asn N4.1%

AAU85

AAC72

Lys K2.6%

AAA91

AAG6

Asp D1.8%

GAU40

GAC27

Glu E2.3%

GAA79

GAG9

Cys C0.7%

UGU14

UGC14

Trp W2.7%

UGA99

UGG4

Arg R1.8%

CGU12

CGC5

CGA46

CGG4

Gly G5.6%

GGU43

GGC32

GGA121

GGG17

Stop 0.2%

UAA7

UAG1

AGA0

AGG0

Genome map

38 annotated features in NC_057518.1

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-loop1

Outer ring: + strand, arrows run clockwise. Inner ring: − strand.
Middle ring: GC% of each gene against the whole genome (33.6%, dashed): out is GC-richer, in is AT-richer (full height = 6 points).

All 38 features as a table

Annotated features of Didelphis marsupialis (NC_057518.1)
Feature	Type	Start	End	Length	Strand	GC
tRNA-Phe	Transfer RNA	1	71	71 bp	+	–
12S rRNA	Ribosomal RNA	73	1,022	950 bp	+	37.4%
tRNA-Val	Transfer RNA	1,024	1,096	73 bp	+	–
16S rRNA	Ribosomal RNA	1,097	2,668	1,572 bp	+	35.5%
tRNA-Leu (UUR)	Transfer RNA	2,669	2,742	74 bp	+	–
ND1	Protein-coding gene	2,744	3,698	955 bp	+	35.3%
tRNA-Ile	Transfer RNA	3,699	3,767	69 bp	+	–
tRNA-Gln	Transfer RNA	3,765	3,834	70 bp	−	–
tRNA-Met	Transfer RNA	3,835	3,903	69 bp	+	–
ND2	Protein-coding gene	3,904	4,947	1,044 bp	+	32.7%
tRNA-Ala	Transfer RNA	4,945	5,013	69 bp	−	–
tRNA-Cys	Transfer RNA	5,022	5,088	67 bp	−	–
tRNA-Trp	Transfer RNA	5,099	5,169	71 bp	+	–
tRNA-Asn	Transfer RNA	5,256	5,327	72 bp	−	–
tRNA-Tyr	Transfer RNA	5,330	5,397	68 bp	+	–
COX1	Protein-coding gene	5,399	6,940	1,542 bp	+	36.7%
tRNA-Ser (UCN)	Transfer RNA	6,942	7,010	69 bp	−	–
tRNA-Asp	Transfer RNA	7,015	7,084	70 bp	+	–
COX2	Protein-coding gene	7,087	7,768	682 bp	+	34.3%
tRNA-Lys	Transfer RNA	7,769	7,827	59 bp	+	–
ATP8	Protein-coding gene	7,830	8,039	210 bp	+	29.5%
ATP6	Protein-coding gene	7,994	8,674	681 bp	+	33.2%
COX3	Protein-coding gene	8,674	9,457	784 bp	+	36.9%
tRNA-Gly	Transfer RNA	9,458	9,525	68 bp	+	–
ND3	Protein-coding gene	9,526	9,871	346 bp	+	34.1%
tRNA-Arg	Transfer RNA	9,872	9,941	70 bp	+	–
ND4L	Protein-coding gene	9,942	10,238	297 bp	+	31.3%
ND4	Protein-coding gene	10,232	11,609	1,378 bp	+	33.2%
tRNA-His	Transfer RNA	11,610	11,678	69 bp	+	–
tRNA-Ser (AGY)	Transfer RNA	11,679	11,734	56 bp	+	–
tRNA-Leu (CUN)	Transfer RNA	11,736	11,806	71 bp	+	–
ND5	Protein-coding gene	11,807	13,606	1,800 bp	+	33.1%
ND6	Protein-coding gene	13,603	14,109	507 bp	−	31.6%
tRNA-Glu	Transfer RNA	14,110	14,178	69 bp	−	–
CYTB	Protein-coding gene	14,180	15,328	1,149 bp	+	38.3%
tRNA-Thr	Transfer RNA	15,337	15,404	68 bp	+	–
tRNA-Pro	Transfer RNA	15,407	15,472	66 bp	−	–
D-loop	Control region	15,473	17,157	1,685 bp	–	23.3%