Crocodylus siamensis

Siamese crocodile

Maximum lifespan

49 yr

AnAge record

mtDNA size

16,836 bp

RefSeq NC_008795.1

GC content

43.24%

Whole genome

Non-coding

1,331 bp

D-loop 1,108 bp

Where Siamese crocodile sits among 2,335 species

Whole-genome GC content against maximum lifespan. Siamese crocodile has the 157th longest lifespan of them.

This species
Other reptiles
Other classes

Plot other mtDNA features with this species highlighted

Base composition

Whole genome16,836 bp

GC skew (G − C) / (G + C): −0.317
AT skew (A − T) / (A + T): +0.128

Life history

Maximum lifespan: 49 years
Adult weight: 42.5 kg

Lifespan from AnAge · AnAge record · other traits from AnAge Build 15 (HAGRID 03260)

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 RefSeq

Whole genome16,836 bp

Protein-coding11,382 bp

12S rRNA985 bp

16S rRNA1,597 bp

All tRNA1,543 bp

D-loop1,108 bp

Genes and regions

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

Base composition of Crocodylus siamensis genes

ND1NADH dehydrogenase subunit 1	963 bp	28.0%	27.1%	15.3%	29.6%	44.86%	−0.319	+0.017
ND2NADH dehydrogenase subunit 2	1,056 bp	30.6%	25.5%	11.6%	32.3%	43.94%	−0.470	+0.091
COX1Cytochrome c oxidase subunit I	1,557 bp	29.1%	26.8%	16.4%	27.7%	44.12%	−0.258	+0.041
COX2Cytochrome c oxidase subunit II	684 bp	33.8%	25.1%	13.7%	27.3%	41.08%	−0.331	+0.146
ATP8ATP synthase F0 subunit 8	162 bp	37.7%	23.5%	9.3%	29.6%	38.89%	−0.524	+0.232
ATP6ATP synthase F0 subunit 6	696 bp	32.3%	24.7%	11.5%	31.5%	42.96%	−0.465	+0.134
COX3Cytochrome c oxidase subunit III	784 bp	27.9%	26.1%	16.3%	29.6%	45.92%	−0.289	+0.033
ND3NADH dehydrogenase subunit 3	348 bp	29.0%	26.7%	17.0%	27.3%	44.25%	−0.234	+0.041
ND4LNADH dehydrogenase subunit 4L	294 bp	25.9%	29.3%	11.9%	33.0%	44.90%	−0.470	−0.062
ND4NADH dehydrogenase subunit 4	1,374 bp	31.7%	25.5%	12.4%	30.4%	42.87%	−0.419	+0.108
ND5NADH dehydrogenase subunit 5	1,854 bp	30.9%	23.8%	13.4%	31.9%	45.31%	−0.410	+0.128
ND6NADH dehydrogenase subunit 6	528 bp	41.1%	15.7%	8.5%	34.7%	43.18%	−0.605	+0.447
CYTBCytochrome b	1,156 bp	28.8%	26.0%	14.0%	31.1%	45.16%	−0.379	+0.050
12S rRNA12S ribosomal RNA	985 bp	32.9%	19.3%	20.6%	27.2%	47.82%	−0.138	+0.261
16S rRNA16S ribosomal RNA	1,597 bp	36.1%	21.0%	18.5%	24.4%	42.89%	−0.136	+0.263
D-loopControl region (D-loop)	1,108 bp	38.8%	30.0%	12.0%	19.2%	31.23%	−0.231	+0.129

Codon usage

Counts per codon, darker is more frequent

Gene

3,818 codons in all protein-coding genes. Grouped with the Vertebrate mitochondrial code (NCBI table 2).

Phe F5.7%

UUU82

UUC136

Leu L17.0%

UUA113

UUG22

CUU74

CUC89

CUA278

CUG72

Ile I7.9%

AUU136

AUC164

Met M5.2%

AUA149

AUG50

Val V5.0%

GUU30

GUC52

GUA80

GUG29

Ser S7.5%

UCU30

UCC80

UCA101

UCG13

AGU17

AGC46

Pro P5.2%

CCU25

CCC49

CCA111

CCG15

Thr T9.2%

ACU45

ACC136

ACA156

ACG15

Ala A7.9%

GCU47

GCC146

GCA100

GCG8

Tyr Y2.9%

UAU38

UAC74

His H2.5%

CAU23

CAC74

Gln Q2.8%

CAA88

CAG20

Asn N3.5%

AAU34

AAC98

Lys K2.3%

AAA79

AAG10

Asp D1.8%

GAU19

GAC51

Glu E2.4%

GAA65

GAG27

Cys C0.7%

UGU11

UGC17

Trp W2.6%

UGA81

UGG19

Arg R1.8%

CGU6

CGC15

CGA41

CGG8

Gly G5.6%

GGU22

GGC59

GGA85

GGG47

Stop 0.3%

UAA9

UAG0

AGA0

AGG2

Genome map

38 annotated features in NC_008795.1

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 (43.2%, dashed): out is GC-richer, in is AT-richer (full height = 6 points).

All 38 features as a table

Annotated features of Crocodylus siamensis (NC_008795.1)
Feature	Type	Start	End	Length	Strand	GC
12S rRNA	Ribosomal RNA	1	985	985 bp	+	47.8%
tRNA-Val	Transfer RNA	986	1,054	69 bp	+	–
16S rRNA	Ribosomal RNA	1,055	2,651	1,597 bp	+	42.9%
tRNA-Leu (UUR)	Transfer RNA	2,653	2,728	76 bp	+	–
ND1	Protein-coding gene	2,729	3,691	963 bp	+	44.9%
tRNA-Ile	Transfer RNA	3,690	3,761	72 bp	+	–
tRNA-Gln	Transfer RNA	3,760	3,830	71 bp	−	–
tRNA-Met	Transfer RNA	3,833	3,900	68 bp	+	–
ND2	Protein-coding gene	3,905	4,960	1,056 bp	+	43.9%
tRNA-Trp	Transfer RNA	4,961	5,034	74 bp	+	–
tRNA-Ala	Transfer RNA	5,037	5,105	69 bp	−	–
tRNA-Asn	Transfer RNA	5,107	5,179	73 bp	−	–
tRNA-Cys	Transfer RNA	5,186	5,251	66 bp	−	–
tRNA-Tyr	Transfer RNA	5,252	5,322	71 bp	−	–
COX1	Protein-coding gene	5,324	6,880	1,557 bp	+	44.1%
tRNA-Ser (UCN)	Transfer RNA	6,901	6,970	70 bp	−	–
tRNA-Asp	Transfer RNA	6,974	7,044	71 bp	+	–
COX2	Protein-coding gene	7,045	7,728	684 bp	+	41.1%
tRNA-Lys	Transfer RNA	7,730	7,803	74 bp	+	–
ATP8	Protein-coding gene	7,805	7,966	162 bp	+	38.9%
ATP6	Protein-coding gene	7,945	8,640	696 bp	+	43.0%
COX3	Protein-coding gene	8,640	9,423	784 bp	+	45.9%
tRNA-Gly	Transfer RNA	9,424	9,493	70 bp	+	–
ND3	Protein-coding gene	9,494	9,841	348 bp	+	44.3%
tRNA-Arg	Transfer RNA	9,852	9,920	69 bp	+	–
ND4L	Protein-coding gene	9,924	10,217	294 bp	+	44.9%
ND4	Protein-coding gene	10,211	11,584	1,374 bp	+	42.9%
tRNA-Ser (AGY)	Transfer RNA	11,614	11,674	61 bp	+	–
tRNA-His	Transfer RNA	11,692	11,761	70 bp	+	–
tRNA-Leu (CUN)	Transfer RNA	11,789	11,859	71 bp	+	–
ND5	Protein-coding gene	11,863	13,716	1,854 bp	+	45.3%
ND6	Protein-coding gene	13,673	14,200	528 bp	−	43.2%
tRNA-Glu	Transfer RNA	14,201	14,271	71 bp	−	–
CYTB	Protein-coding gene	14,287	15,442	1,156 bp	+	45.2%
tRNA-Thr	Transfer RNA	15,499	15,570	72 bp	+	–
tRNA-Pro	Transfer RNA	15,582	15,649	68 bp	−	–
tRNA-Phe	Transfer RNA	15,660	15,728	69 bp	+	–
D-loop	Control region	15,729	16,836	1,108 bp	–	31.2%