Strongylocentrotus droebachiensis
Northern sea urchin
GC content
41.05%
Whole genome
Non-coding
262 bp
Including the D-loop
Where Northern sea urchin sits among 2,335 species
Whole-genome GC content against maximum lifespan. Northern sea urchin has the 199th longest lifespan of them.
- This species
- All other species
Base composition
Whole genome15,717 bp
- GC skew (G − C) / (G + C)
- −0.106
- AT skew (A − T) / (A + T)
- −0.025
About this record
- Lifespan source
- SeaLifeBase v26.06
- Based on
- an animal in the wild
- Data quality
- acceptable
- Licence
- CC BY-NC 4.0
- Status
- New in build 2
- In the database since
- build 2 (2026-11-13)
The lifespan value is for non-commercial use only; the genome data is not restricted by it.
Every change against the 2015 build is in the changelog download.
Composition by region
Reference (L) strand as deposited in RefSeqWhole genome15,717 bp
Protein-coding11,488 bp
12S rRNA907 bp
16S rRNA1,541 bp
All tRNA1,549 bp
Genes and regions
Select a column to sort; select a gene to compare it across species| Composition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| ND1NADH dehydrogenase subunit 1 | 972 bp | 41.77% | −0.089 | −0.194 | |||||
| ND2NADH dehydrogenase subunit 2 | 1,059 bp | 39.38% | −0.151 | −0.156 | |||||
| COX1Cytochrome c oxidase subunit I | 1,554 bp | 44.14% | −0.099 | −0.152 | |||||
| COX2Cytochrome c oxidase subunit II | 690 bp | 43.33% | −0.157 | −0.049 | |||||
| ATP8ATP synthase F0 subunit 8 | 165 bp | 34.55% | −0.333 | +0.019 | |||||
| ATP6ATP synthase F0 subunit 6 | 684 bp | 41.08% | −0.153 | −0.146 | |||||
| COX3Cytochrome c oxidase subunit III | 783 bp | 43.55% | −0.132 | −0.077 | |||||
| ND3NADH dehydrogenase subunit 3 | 351 bp | 42.45% | −0.114 | −0.158 | |||||
| ND4LNADH dehydrogenase subunit 4L | 294 bp | 38.78% | −0.175 | −0.122 | |||||
| ND4NADH dehydrogenase subunit 4 | 1,389 bp | 41.83% | −0.164 | −0.045 | |||||
| ND5NADH dehydrogenase subunit 5 | 1,920 bp | 41.25% | −0.154 | −0.060 | |||||
| ND6NADH dehydrogenase subunit 6 | 498 bp | 37.55% | −0.230 | +0.325 | |||||
| CYTBCytochrome b | 1,143 bp | 41.38% | −0.171 | −0.075 | |||||
| 12S rRNA12S ribosomal RNA | 907 bp | 43.00% | −0.010 | +0.250 | |||||
| 16S rRNA16S ribosomal RNA | 1,541 bp | 38.35% | +0.019 | +0.171 |
Codon usage
Counts per codon, darker is more frequent3,834 codons in all protein-coding genes. Grouped with the Echinoderm and flatworm mitochondrial code (NCBI table 9).
Phe F8.0%
UUU197
UUC110
Leu L16.0%
UUA140
UUG74
CUU117
CUC74
CUA166
CUG41
Ile I9.5%
AUU141
AUC69
AUA153
Met M2.8%
AUG106
Val V6.7%
GUU94
GUC48
GUA72
GUG41
Ser S10.0%
UCU108
UCC72
UCA69
UCG17
AGU19
AGC25
AGA51
AGG23
Pro P4.5%
CCU49
CCC51
CCA60
CCG11
Thr T6.3%
ACU58
ACC74
ACA86
ACG22
Ala A7.7%
GCU82
GCC108
GCA89
GCG18
Tyr Y2.9%
UAU46
UAC66
His H2.1%
CAU24
CAC56
Gln Q2.2%
CAA55
CAG28
Asn N3.9%
AAU29
AAC55
AAA67
Lys K1.4%
AAG53
Asp D1.8%
GAU30
GAC38
Glu E2.5%
GAA53
GAG43
Cys C0.8%
UGU12
UGC18
Trp W2.8%
UGA78
UGG28
Arg R1.9%
CGU9
CGC8
CGA43
CGG14
Gly G6.1%
GGU34
GGC46
GGA101
GGG52
Stop 0.3%
UAA9
UAG4
Genome map
37 annotated features in NC_009940.1Hover, 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
- Outer ring: + strand, arrows run clockwise. Inner ring: − strand.
- Middle ring: GC% of each gene against the whole genome (41.1%, dashed): out is GC-richer, in is AT-richer (full height = 6 points).
All 37 features as a table
| Feature | Type | Start | End | Length | Strand | GC |
|---|---|---|---|---|---|---|
| tRNA-Phe | Transfer RNA | 1 | 73 | 73 bp | + | – |
| 12S rRNA | Ribosomal RNA | 74 | 980 | 907 bp | + | 43.0% |
| tRNA-Glu | Transfer RNA | 968 | 1,036 | 69 bp | + | – |
| tRNA-Thr | Transfer RNA | 1,041 | 1,113 | 73 bp | + | – |
| tRNA-Pro | Transfer RNA | 1,241 | 1,312 | 72 bp | + | – |
| tRNA-Gln | Transfer RNA | 1,314 | 1,385 | 72 bp | − | – |
| tRNA-Asn | Transfer RNA | 1,392 | 1,463 | 72 bp | + | – |
| tRNA-Leu (CUN) | Transfer RNA | 1,464 | 1,535 | 72 bp | + | – |
| tRNA-Ala | Transfer RNA | 1,535 | 1,605 | 71 bp | − | – |
| tRNA-Trp | Transfer RNA | 1,608 | 1,676 | 69 bp | + | – |
| tRNA-Cys | Transfer RNA | 1,677 | 1,744 | 68 bp | + | – |
| tRNA-Val | Transfer RNA | 1,742 | 1,815 | 74 bp | − | – |
| tRNA-Met | Transfer RNA | 1,842 | 1,916 | 75 bp | + | – |
| tRNA-Asp | Transfer RNA | 1,917 | 1,986 | 70 bp | − | – |
| tRNA-Tyr | Transfer RNA | 1,992 | 2,062 | 71 bp | + | – |
| tRNA-Gly | Transfer RNA | 2,070 | 2,137 | 68 bp | + | – |
| tRNA-Leu (UUR) | Transfer RNA | 2,139 | 2,209 | 71 bp | + | – |
| ND1 | Protein-coding gene | 2,213 | 3,184 | 972 bp | + | 41.8% |
| tRNA-Ile | Transfer RNA | 3,186 | 3,256 | 71 bp | + | – |
| ND2 | Protein-coding gene | 3,257 | 4,315 | 1,059 bp | + | 39.4% |
| 16S rRNA | Ribosomal RNA | 4,316 | 5,856 | 1,541 bp | + | 38.4% |
| COX1 | Protein-coding gene | 5,852 | 7,405 | 1,554 bp | + | 44.1% |
| tRNA-Arg | Transfer RNA | 7,416 | 7,482 | 67 bp | + | – |
| ND4L | Protein-coding gene | 7,485 | 7,778 | 294 bp | + | 38.8% |
| COX2 | Protein-coding gene | 7,778 | 8,467 | 690 bp | + | 43.3% |
| tRNA-Lys | Transfer RNA | 8,472 | 8,542 | 71 bp | + | – |
| ATP8 | Protein-coding gene | 8,543 | 8,707 | 165 bp | + | 34.6% |
| ATP6 | Protein-coding gene | 8,704 | 9,387 | 684 bp | + | 41.1% |
| COX3 | Protein-coding gene | 9,391 | 10,173 | 783 bp | + | 43.6% |
| tRNA-Ser (UCN) | Transfer RNA | 10,178 | 10,242 | 65 bp | − | – |
| ND3 | Protein-coding gene | 10,259 | 10,609 | 351 bp | + | 42.5% |
| ND4 | Protein-coding gene | 10,626 | 12,014 | 1,389 bp | + | 41.8% |
| tRNA-His | Transfer RNA | 12,004 | 12,074 | 71 bp | + | – |
| tRNA-Ser (AGY) | Transfer RNA | 12,075 | 12,142 | 68 bp | + | – |
| ND5 | Protein-coding gene | 12,143 | 14,062 | 1,920 bp | + | 41.3% |
| ND6 | Protein-coding gene | 14,054 | 14,551 | 498 bp | − | 37.6% |
| CYTB | Protein-coding gene | 14,576 | 1 | 1,143 bp | + | 41.4% |