MitoAge

Caretta caretta

Loggerhead sea turtle

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Retired record. RefSeq NC_016923.1 is not in NCBI RefSeq release 237 (mitochondrion.1.genomic.gbff.gz, file date 2026-09-03) (suppressed) and the release has no other complete mitogenome of NCBI species 8467 (Caretta caretta); no longer qualifies under the RefSeq-only rule Its build 1 values are kept and it is left out of the correlations.

Maximum lifespan
77 yr
AnAge record
mtDNA size
16,737 bp
RefSeq NC_016923.1
GC content
38.72%
Whole genome
Non-coding
1,272 bp
D-loop 1,234 bp

Where Loggerhead sea turtle sits among 2,335 species

Whole-genome GC content against maximum lifespan. Loggerhead sea turtle has the 55th longest lifespan of them.

10203040501 yr10 yr100 yrMaximum lifespan, log scaleGC %Loggerhead sea turtle
  • This species
  • Other reptiles
  • Other classes
Plot other mtDNA features with this species highlighted

Base composition

Whole genome16,737 bp
GC skew (G − C) / (G + C)
−0.382
AT skew (A − T) / (A + T)
+0.155

Life history

Maximum lifespan
77 years
Adult weight
156.5 kg
Female sexual maturity
10 years
Male sexual maturity
10 years
Gestation or incubation
60 days
Litter or clutch size
115

Lifespan from AnAge · AnAge record · other traits from AnAge Build 15 (HAGRID 03683)

About this record

Lifespan source
AnAge build 15
Based on
an animal in the wild
Data quality
acceptable, medium sample
Licence
Free to use, subject to the Human Ageing Genomic Resources conditions of use
Status
Retired
In the database since
build 1 (2015-07-01)
Last changed
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 genome16,737 bp
Protein-coding11,347 bp
12S rRNA970 bp
16S rRNA1,611 bp
All tRNA1,546 bp
D-loop1,234 bp

Genes and regions

Select a column to sort; select a gene to compare it across species
Composition
ND1NADH dehydrogenase subunit 1967 bp33.0%27.1%10.5%29.4%39.92%−0.472+0.098
ND2NADH dehydrogenase subunit 21,042 bp37.3%23.9%7.9%30.9%38.77%−0.594+0.219
COX1Cytochrome c oxidase subunit I1,548 bp30.2%28.2%15.3%26.3%41.60%−0.264+0.035
COX2Cytochrome c oxidase subunit II687 bp36.4%26.5%12.4%24.7%37.12%−0.333+0.157
ATP8ATP synthase F0 subunit 8165 bp41.2%23.0%4.8%30.9%35.76%−0.729+0.283
ATP6ATP synthase F0 subunit 6682 bp35.0%27.3%7.8%29.9%37.68%−0.588+0.125
COX3Cytochrome c oxidase subunit III784 bp31.6%26.5%14.4%27.4%41.84%−0.311+0.088
ND3NADH dehydrogenase subunit 3350 bp32.9%28.9%10.0%28.3%38.29%−0.478+0.065
ND4LNADH dehydrogenase subunit 4L297 bp31.6%29.0%9.4%30.0%39.39%−0.521+0.044
ND4NADH dehydrogenase subunit 41,381 bp36.1%27.3%9.3%27.4%36.64%−0.494+0.138
ND5NADH dehydrogenase subunit 51,797 bp35.6%24.4%9.5%30.5%40.01%−0.524+0.186
ND6NADH dehydrogenase subunit 6525 bp46.3%15.4%7.4%30.9%38.29%−0.612+0.500
CYTBCytochrome b1,144 bp32.3%24.4%11.1%32.3%43.36%−0.488+0.139
12S rRNA12S ribosomal RNA970 bp37.2%21.1%16.8%24.8%41.65%−0.193+0.276
16S rRNA16S ribosomal RNA1,611 bp39.4%23.2%16.2%21.2%37.37%−0.133+0.259
D-loopControl region (D-loop)1,234 bp32.7%33.6%9.6%16.0%27.87%−0.253−0.015

Codon usage

Counts per codon, darker is more frequent

3,787 codons in all protein-coding genes. Grouped with the Vertebrate mitochondrial code (NCBI table 2).

Phe F5.7%
UUU82
UUC133
Leu L16.2%
UUA150
UUG10
CUU59
CUC70
CUA319
CUG7
Ile I8.2%
AUU131
AUC179
Met M6.3%
AUA215
AUG22
Val V3.9%
GUU35
GUC16
GUA82
GUG13
Ser S7.4%
UCU26
UCC74
UCA133
UCG1
AGU12
AGC36
Pro P5.6%
CCU26
CCC39
CCA145
CCG3
Thr T9.9%
ACU53
ACC153
ACA166
ACG3
Ala A6.4%
GCU50
GCC103
GCA84
GCG4
Tyr Y3.4%
UAU51
UAC77
His H2.6%
CAU33
CAC66
Gln Q2.7%
CAA101
CAG1
Asn N3.9%
AAU42
AAC107
Lys K2.4%
AAA89
AAG1
Asp D1.6%
GAU25
GAC36
Glu E2.4%
GAA88
GAG4
Cys C0.7%
UGU12
UGC14
Trp W3.0%
UGA106
UGG6
Arg R1.8%
CGU9
CGC8
CGA53
CGG0
Gly G5.8%
GGU31
GGC62
GGA105
GGG20
Stop 0.2%
UAA4
UAG0
AGA0
AGG2

Genome map

38 annotated features in NC_016923.1

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 (38.7%, dashed): out is GC-richer, in is AT-richer (full height = 6 points).
All 38 features as a table
FeatureTypeStartEndLengthStrandGC
tRNA-PheTransfer RNA16969 bp+–
12S rRNARibosomal RNA701,039970 bp+41.7%
tRNA-ValTransfer RNA1,0401,10869 bp+–
16S rRNARibosomal RNA1,1092,7191,611 bp+37.4%
tRNA-Leu (UUR)Transfer RNA2,7202,79576 bp+–
ND1Protein-coding gene2,7963,762967 bp+39.9%
tRNA-IleTransfer RNA3,7643,83269 bp+–
tRNA-GlnTransfer RNA3,8323,90271 bp−–
tRNA-MetTransfer RNA3,9023,97069 bp+–
ND2Protein-coding gene3,9715,0121,042 bp+38.8%
tRNA-TrpTransfer RNA5,0135,08977 bp+–
tRNA-AlaTransfer RNA5,0915,15969 bp−–
tRNA-AsnTransfer RNA5,1615,23373 bp−–
tRNA-CysTransfer RNA5,2605,32566 bp−–
tRNA-TyrTransfer RNA5,3265,39671 bp−–
COX1Protein-coding gene5,3986,9451,548 bp+41.6%
tRNA-Ser (UCN)Transfer RNA6,9377,00771 bp−–
tRNA-AspTransfer RNA7,0107,07970 bp+–
COX2Protein-coding gene7,0807,766687 bp+37.1%
tRNA-LysTransfer RNA7,7677,83973 bp+–
ATP8Protein-coding gene7,8418,005165 bp+35.8%
ATP6Protein-coding gene7,9968,677682 bp+37.7%
COX3Protein-coding gene8,6799,462784 bp+41.8%
tRNA-GlyTransfer RNA9,4639,53068 bp+–
ND3Protein-coding gene9,5319,880350 bp+38.3%
tRNA-ArgTransfer RNA9,8819,95070 bp+–
ND4LProtein-coding gene9,95110,247297 bp+39.4%
ND4Protein-coding gene10,24111,6211,381 bp+36.6%
tRNA-HisTransfer RNA11,62211,69170 bp+–
tRNA-Ser (AGY)Transfer RNA11,69211,75766 bp+–
tRNA-Leu (CUN)Transfer RNA11,75711,82872 bp+–
ND5Protein-coding gene11,82913,6251,797 bp+40.0%
ND6Protein-coding gene13,62114,145525 bp−38.3%
tRNA-GluTransfer RNA14,14614,21368 bp−–
CYTBProtein-coding gene14,21715,3601,144 bp+43.4%
tRNA-ThrTransfer RNA15,36115,43171 bp+–
tRNA-ProTransfer RNA15,43315,50371 bp−–
D-loopControl region15,50416,7371,234 bp–27.9%

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