Platysternon megacephalum
Big-headed turtle
GC content
38.60%
Whole genome
Non-coding
3,559 bp
D-loop 1,139 bp
Where Big-headed turtle sits among 2,335 species
Whole-genome GC content against maximum lifespan. Big-headed turtle has the 554th longest lifespan of them.
- This species
- Other reptiles
- Other classes
Base composition
Whole genome19,043 bp
- GC skew (G − C) / (G + C)
- −0.329
- AT skew (A − T) / (A + T)
- +0.107
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
- Updated in build 2
- 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 RefSeqWhole genome19,043 bp
Protein-coding11,387 bp
12S rRNA957 bp
16S rRNA1,608 bp
All tRNA1,551 bp
D-loop1,139 bp
Genes and regions
Select a column to sort; select a gene to compare it across species| Composition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| ND1NADH dehydrogenase subunit 1 | 972 bp | 40.84% | −0.350 | +0.016 | |||||
| ND2NADH dehydrogenase subunit 2 | 1,041 bp | 39.87% | −0.533 | +0.166 | |||||
| COX1Cytochrome c oxidase subunit I | 1,548 bp | 41.73% | −0.146 | −0.040 | |||||
| COX2Cytochrome c oxidase subunit II | 687 bp | 39.74% | −0.267 | +0.130 | |||||
| ATP8ATP synthase F0 subunit 8 | 168 bp | 36.31% | −0.607 | +0.252 | |||||
| ATP6ATP synthase F0 subunit 6 | 684 bp | 37.28% | −0.482 | +0.086 | |||||
| COX3Cytochrome c oxidase subunit III | 784 bp | 43.50% | −0.238 | +0.011 | |||||
| ND3NADH dehydrogenase subunit 3 | 349 bp | 37.25% | −0.323 | +0.005 | |||||
| ND4LNADH dehydrogenase subunit 4L | 297 bp | 39.06% | −0.500 | −0.039 | |||||
| ND4NADH dehydrogenase subunit 4 | 1,381 bp | 39.97% | −0.388 | +0.112 | |||||
| ND5NADH dehydrogenase subunit 5 | 1,815 bp | 39.39% | −0.399 | +0.082 | |||||
| ND6NADH dehydrogenase subunit 6 | 525 bp | 39.62% | −0.577 | +0.489 | |||||
| CYTBCytochrome b | 1,144 bp | 41.17% | −0.384 | +0.037 | |||||
| 12S rRNA12S ribosomal RNA | 957 bp | 41.69% | −0.168 | +0.229 | |||||
| 16S rRNA16S ribosomal RNA | 1,608 bp | 38.50% | −0.137 | +0.240 | |||||
| D-loopControl region (D-loop) | 1,139 bp | 34.33% | −0.361 | +0.070 |
Codon usage
Counts per codon, darker is more frequent3,797 codons in all protein-coding genes. Grouped with the Vertebrate mitochondrial code (NCBI table 2).
Phe F5.8%
UUU103
UUC119
Leu L16.6%
UUA172
UUG30
CUU55
CUC81
CUA251
CUG40
Ile I7.8%
AUU158
AUC138
Met M6.1%
AUA187
AUG44
Val V4.7%
GUU43
GUC23
GUA85
GUG29
Ser S7.4%
UCU48
UCC57
UCA120
UCG9
AGU13
AGC34
Pro P5.4%
CCU36
CCC33
CCA122
CCG13
Thr T9.0%
ACU67
ACC120
ACA147
ACG9
Ala A6.5%
GCU65
GCC91
GCA83
GCG9
Tyr Y3.2%
UAU41
UAC79
His H2.9%
CAU44
CAC67
Gln Q2.7%
CAA87
CAG16
Asn N3.6%
AAU43
AAC95
Lys K2.6%
AAA90
AAG7
Asp D1.7%
GAU19
GAC44
Glu E2.4%
GAA78
GAG14
Cys C0.9%
UGU14
UGC20
Trp W2.9%
UGA95
UGG15
Arg R1.8%
CGU11
CGC10
CGA42
CGG6
Gly G5.7%
GGU34
GGC50
GGA80
GGG53
Stop 0.2%
UAA5
UAG2
AGA1
AGG1
Genome map
38 annotated features in NC_007970.1Hover, 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 (38.6%, dashed): out is GC-richer, in is AT-richer (full height = 6 points).
All 38 features as a table
| Feature | Type | Start | End | Length | Strand | GC |
|---|---|---|---|---|---|---|
| tRNA-Phe | Transfer RNA | 1 | 70 | 70 bp | + | – |
| 12S rRNA | Ribosomal RNA | 71 | 1,027 | 957 bp | + | 41.7% |
| tRNA-Val | Transfer RNA | 1,028 | 1,095 | 68 bp | + | – |
| 16S rRNA | Ribosomal RNA | 1,096 | 2,703 | 1,608 bp | + | 38.5% |
| tRNA-Leu (UUR) | Transfer RNA | 2,704 | 2,777 | 74 bp | + | – |
| ND1 | Protein-coding gene | 2,772 | 3,743 | 972 bp | + | 40.8% |
| tRNA-Ile | Transfer RNA | 3,743 | 3,813 | 71 bp | + | – |
| tRNA-His | Transfer RNA | 4,289 | 4,357 | 69 bp | + | – |
| tRNA-Ser (AGY) | Transfer RNA | 4,356 | 4,421 | 66 bp | + | – |
| tRNA-Leu (CUN) | Transfer RNA | 4,421 | 4,492 | 72 bp | + | – |
| ND5 | Protein-coding gene | 4,494 | 6,308 | 1,815 bp | + | 39.4% |
| tRNA-Thr | Transfer RNA | 6,458 | 6,527 | 70 bp | + | – |
| tRNA-Pro | Transfer RNA | 6,529 | 6,598 | 70 bp | + | – |
| D-loop | Control region | 6,599 | 7,737 | 1,139 bp | – | 34.3% |
| tRNA-Gln | Transfer RNA | 7,738 | 7,808 | 71 bp | − | – |
| tRNA-Met | Transfer RNA | 7,807 | 7,875 | 69 bp | + | – |
| ND2 | Protein-coding gene | 7,876 | 8,916 | 1,041 bp | + | 39.9% |
| tRNA-Trp | Transfer RNA | 8,915 | 8,993 | 79 bp | + | – |
| tRNA-Ala | Transfer RNA | 8,994 | 9,062 | 69 bp | − | – |
| tRNA-Asn | Transfer RNA | 9,064 | 9,137 | 74 bp | − | – |
| tRNA-Cys | Transfer RNA | 9,165 | 9,230 | 66 bp | − | – |
| tRNA-Tyr | Transfer RNA | 9,231 | 9,301 | 71 bp | − | – |
| COX1 | Protein-coding gene | 9,303 | 10,850 | 1,548 bp | + | 41.7% |
| tRNA-Ser (UCN) | Transfer RNA | 10,842 | 10,912 | 71 bp | + | – |
| tRNA-Asp | Transfer RNA | 10,913 | 10,985 | 73 bp | + | – |
| COX2 | Protein-coding gene | 10,986 | 11,672 | 687 bp | + | 39.7% |
| tRNA-Lys | Transfer RNA | 11,674 | 11,746 | 73 bp | + | – |
| ATP8 | Protein-coding gene | 11,748 | 11,915 | 168 bp | + | 36.3% |
| ATP6 | Protein-coding gene | 11,918 | 12,601 | 684 bp | + | 37.3% |
| COX3 | Protein-coding gene | 12,601 | 13,384 | 784 bp | + | 43.5% |
| tRNA-Gly | Transfer RNA | 13,385 | 13,455 | 71 bp | + | – |
| ND3 | Protein-coding gene | 13,455 | 13,804 | 350 bp | + | 37.3% |
| tRNA-Arg | Transfer RNA | 13,806 | 13,873 | 68 bp | + | – |
| ND4L | Protein-coding gene | 13,874 | 14,170 | 297 bp | + | 39.1% |
| ND4 | Protein-coding gene | 14,164 | 15,544 | 1,381 bp | + | 40.0% |
| ND6 | Protein-coding gene | 16,170 | 16,694 | 525 bp | − | 39.6% |
| tRNA-Glu | Transfer RNA | 16,695 | 16,765 | 71 bp | − | – |
| CYTB | Protein-coding gene | 16,766 | 17,909 | 1,144 bp | + | 41.2% |