Crotalus horridus
Timber rattlesnake
Retired record. RefSeq NC_014400.1 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 35024 (Crotalus horridus); no longer qualifies under the RefSeq-only rule Its build 1 values are kept and it is left out of the correlations.
GC content
42.90%
Whole genome
Non-coding
2,532 bp
Including the D-loop
Where Timber rattlesnake sits among 2,335 species
Whole-genome GC content against maximum lifespan. Timber rattlesnake has the 434th longest lifespan of them.
- This species
- Other reptiles
- Other classes
Base composition
Whole genome17,260 bp
- GC skew (G − C) / (G + C)
- −0.375
- AT skew (A − T) / (A + T)
- +0.130
Life history
- Maximum lifespan
- 30.2 years
- Adult weight
- 1 kg
- Female sexual maturity
- 7 years
- Male sexual maturity
- 5 years
- Gestation or incubation
- 135 days
- Litter or clutch size
- 9
Lifespan from AnAge · AnAge record · other traits from AnAge Build 15 (HAGRID 03628)
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
- 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 RefSeqWhole genome17,260 bp
Protein-coding11,112 bp
All tRNA1,425 bp
Genes and regions
Select a column to sort; select a gene to compare it across species| Composition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| ND1NADH dehydrogenase subunit 1 | 957 bp | 44.62% | −0.419 | +0.072 | |||||
| ND2NADH dehydrogenase subunit 2 | 1,036 bp | 43.82% | −0.577 | +0.227 | |||||
| COX1Cytochrome c oxidase subunit I | 1,602 bp | 45.19% | −0.265 | +0.018 | |||||
| COX2Cytochrome c oxidase subunit II | 685 bp | 46.57% | −0.310 | +0.169 | |||||
| ATP8ATP synthase F0 subunit 8 | 165 bp | 36.36% | −0.700 | +0.352 | |||||
| ATP6ATP synthase F0 subunit 6 | 681 bp | 39.79% | −0.506 | +0.117 | |||||
| COX3Cytochrome c oxidase subunit III | 782 bp | 43.73% | −0.310 | +0.105 | |||||
| ND3NADH dehydrogenase subunit 3 | 334 bp | 43.11% | −0.431 | +0.137 | |||||
| ND4LNADH dehydrogenase subunit 4L | 291 bp | 41.58% | −0.504 | +0.106 | |||||
| ND4NADH dehydrogenase subunit 4 | 1,221 bp | 45.05% | −0.469 | +0.133 | |||||
| ND5NADH dehydrogenase subunit 5 | 1,774 bp | 41.94% | −0.484 | +0.194 | |||||
| ND6NADH dehydrogenase subunit 6 | 522 bp | 44.06% | −0.661 | +0.527 | |||||
| CYTBCytochrome b | 1,079 bp | 43.37% | −0.474 | +0.008 |
Codon usage
Counts per codon, darker is more frequent3,707 codons in all protein-coding genes. Grouped with the Vertebrate mitochondrial code (NCBI table 2).
Phe F5.3%
UUU82
UUC116
Leu L15.6%
UUA77
UUG23
CUU70
CUC103
CUA260
CUG47
Ile I8.3%
AUU110
AUC196
Met M6.6%
AUA203
AUG41
Val V4.3%
GUU30
GUC31
GUA68
GUG32
Ser S6.9%
UCU44
UCC73
UCA83
UCG9
AGU16
AGC31
Pro P5.6%
CCU21
CCC89
CCA88
CCG8
Thr T10.8%
ACU50
ACC167
ACA174
ACG9
Ala A6.9%
GCU33
GCC121
GCA96
GCG7
Tyr Y3.1%
UAU43
UAC71
His H2.6%
CAU25
CAC71
Gln Q2.6%
CAA82
CAG13
Asn N3.8%
AAU30
AAC111
Lys K2.6%
AAA83
AAG15
Asp D1.5%
GAU16
GAC40
Glu E2.5%
GAA72
GAG20
Cys C0.9%
UGU9
UGC23
Trp W2.6%
UGA77
UGG20
Arg R1.8%
CGU5
CGC14
CGA42
CGG7
Gly G5.4%
GGU23
GGC67
GGA68
GGG43
Stop 0.2%
UAA5
UAG1
AGA1
AGG2
Genome map
39 annotated features in NC_014400.1Hover, 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-loop2
- Outer ring: + strand, arrows run clockwise. Inner ring: − strand.
- Middle ring: GC% of each gene against the whole genome (42.9%, dashed): out is GC-richer, in is AT-richer (full height = 6 points).
All 39 features as a table
| Feature | Type | Start | End | Length | Strand | GC |
|---|---|---|---|---|---|---|
| tRNA-Phe | Transfer RNA | 5 | 68 | 64 bp | + | – |
| 12S rRNA | Ribosomal RNA | 197 | 977 | 781 bp | + | – |
| tRNA-Val | Transfer RNA | 1,055 | 1,117 | 63 bp | + | – |
| 16S rRNA | Ribosomal RNA | 1,156 | 2,585 | 1,430 bp | + | – |
| ND1 | Protein-coding gene | 2,607 | 3,563 | 957 bp | + | 44.6% |
| tRNA-Ile | Transfer RNA | 3,562 | 3,629 | 68 bp | + | – |
| tRNA-Pro | Transfer RNA | 3,634 | 3,696 | 63 bp | + | – |
| D-loop | Control region | 3,698 | 4,722 | 1,025 bp | – | – |
| tRNA-Leu (UUR) | Transfer RNA | 4,722 | 4,794 | 73 bp | + | – |
| tRNA-Gln | Transfer RNA | 4,795 | 4,863 | 69 bp | − | – |
| tRNA-Met | Transfer RNA | 4,864 | 4,926 | 63 bp | + | – |
| ND2 | Protein-coding gene | 4,927 | 5,956 | 1,030 bp | + | 43.8% |
| tRNA-Trp | Transfer RNA | 5,957 | 6,021 | 65 bp | + | – |
| tRNA-Ala | Transfer RNA | 6,024 | 6,088 | 65 bp | − | – |
| tRNA-Asn | Transfer RNA | 6,089 | 6,162 | 74 bp | − | – |
| tRNA-Cys | Transfer RNA | 6,198 | 6,257 | 60 bp | − | – |
| tRNA-Tyr | Transfer RNA | 6,258 | 6,318 | 61 bp | − | – |
| COX1 | Protein-coding gene | 6,320 | 7,921 | 1,602 bp | + | 45.2% |
| tRNA-Ser (UCN) | Transfer RNA | 7,912 | 7,979 | 68 bp | − | – |
| tRNA-Asp | Transfer RNA | 7,980 | 8,042 | 63 bp | + | – |
| COX2 | Protein-coding gene | 8,044 | 8,728 | 685 bp | + | 46.6% |
| tRNA-Lys | Transfer RNA | 8,729 | 8,793 | 65 bp | + | – |
| ATP8 | Protein-coding gene | 8,794 | 8,958 | 165 bp | + | 36.4% |
| ATP6 | Protein-coding gene | 8,949 | 9,629 | 681 bp | + | 39.8% |
| COX3 | Protein-coding gene | 9,629 | 10,410 | 782 bp | + | 43.7% |
| tRNA-Gly | Transfer RNA | 10,411 | 10,470 | 60 bp | + | – |
| ND3 | Protein-coding gene | 10,480 | 10,813 | 334 bp | + | 43.1% |
| tRNA-Arg | Transfer RNA | 10,813 | 10,878 | 66 bp | + | – |
| ND4L | Protein-coding gene | 10,878 | 11,168 | 291 bp | + | 41.6% |
| ND4 | Protein-coding gene | 11,168 | 12,388 | 1,221 bp | + | 45.1% |
| tRNA-His | Transfer RNA | 12,505 | 12,566 | 62 bp | + | – |
| tRNA-Ser (AGY) | Transfer RNA | 12,567 | 12,622 | 56 bp | + | – |
| tRNA-Leu (CUN) | Transfer RNA | 12,623 | 12,694 | 72 bp | + | – |
| ND5 | Protein-coding gene | 12,696 | 14,469 | 1,774 bp | + | 41.9% |
| ND6 | Protein-coding gene | 14,465 | 14,986 | 522 bp | − | 44.1% |
| tRNA-Glu | Transfer RNA | 14,987 | 15,048 | 62 bp | − | – |
| CYTB | Protein-coding gene | 15,049 | 16,127 | 1,079 bp | + | 43.4% |
| tRNA-Thr | Transfer RNA | 16,162 | 16,224 | 63 bp | + | – |
| D-loop | Control region | 16,236 | 17,260 | 1,025 bp | – | – |