Ichthyomyzon unicuspis

Silver lamprey

Maximum lifespan

8 yr

AnAge record

mtDNA size

16,163 bp

RefSeq NC_025553.1

GC content

37.05%

Whole genome

Non-coding

769 bp

D-loop 667 bp

Where Silver lamprey sits among 2,335 species

Whole-genome GC content against maximum lifespan. Silver lamprey has the 1,730th longest lifespan of them.

This species
All other species

Plot other mtDNA features with this species highlighted

Base composition

Whole genome16,163 bp

GC skew (G − C) / (G + C): −0.308
AT skew (A − T) / (A + T): +0.059

Life history

Maximum lifespan: 8 years

Lifespan from AnAge · AnAge record

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: 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 genome16,163 bp

Protein-coding11,369 bp

12S rRNA892 bp

16S rRNA1,619 bp

All tRNA1,531 bp

D-loop667 bp

Genes and regions

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

Base composition of Ichthyomyzon unicuspis genes

ND1NADH dehydrogenase subunit 1	966 bp	30.7%	33.0%	12.2%	24.0%	36.23%	−0.326	−0.036
ND2NADH dehydrogenase subunit 2	1,042 bp	34.5%	31.9%	9.6%	24.1%	33.69%	−0.430	+0.039
COX1Cytochrome c oxidase subunit I	1,557 bp	29.5%	31.5%	15.2%	23.8%	38.99%	−0.219	−0.032
COX2Cytochrome c oxidase subunit II	690 bp	33.2%	29.6%	12.9%	24.3%	37.25%	−0.307	+0.058
ATP8ATP synthase F0 subunit 8	168 bp	33.9%	28.6%	7.1%	30.4%	37.50%	−0.619	+0.086
ATP6ATP synthase F0 subunit 6	679 bp	33.1%	32.7%	8.4%	25.8%	34.17%	−0.509	+0.007
COX3Cytochrome c oxidase subunit III	786 bp	28.5%	29.8%	14.8%	27.0%	41.73%	−0.293	−0.022
ND3NADH dehydrogenase subunit 3	351 bp	28.5%	33.0%	12.3%	26.2%	38.46%	−0.363	−0.074
ND4LNADH dehydrogenase subunit 4L	291 bp	30.2%	28.5%	11.0%	30.2%	41.24%	−0.467	+0.029
ND4NADH dehydrogenase subunit 4	1,374 bp	32.9%	32.3%	9.6%	25.2%	34.79%	−0.448	+0.009
ND5NADH dehydrogenase subunit 5	1,797 bp	34.3%	30.6%	10.3%	24.8%	35.06%	−0.413	+0.057
ND6NADH dehydrogenase subunit 6	519 bp	46.2%	13.5%	10.2%	30.1%	40.27%	−0.493	+0.548
CYTBCytochrome b	1,182 bp	30.5%	32.8%	12.6%	24.1%	36.72%	−0.313	−0.037
12S rRNA12S ribosomal RNA	892 bp	33.9%	22.4%	18.0%	25.7%	43.72%	−0.174	+0.203
16S rRNA16S ribosomal RNA	1,619 bp	38.2%	24.8%	16.7%	20.3%	37.00%	−0.099	+0.212
D-loopControl region (D-loop)	667 bp	33.3%	32.7%	13.2%	20.8%	34.03%	−0.225	+0.009

Codon usage

Counts per codon, darker is more frequent

Gene

3,800 codons in all protein-coding genes. Grouped with the Vertebrate mitochondrial code (NCBI table 2).

Phe F6.2%

UUU146

UUC90

Leu L15.8%

UUA176

UUG19

CUU115

CUC70

CUA196

CUG24

Ile I9.3%

AUU242

AUC112

Met M6.2%

AUA207

AUG30

Val V4.2%

GUU64

GUC23

GUA59

GUG13

Ser S6.9%

UCU67

UCC44

UCA92

UCG3

AGU26

AGC30

Pro P5.2%

CCU44

CCC41

CCA107

CCG6

Thr T9.0%

ACU103

ACC91

ACA144

ACG3

Ala A6.9%

GCU84

GCC97

GCA77

GCG3

Tyr Y2.9%

UAU59

UAC52

His H2.7%

CAU40

CAC62

Gln Q2.6%

CAA96

CAG4

Asn N3.9%

AAU86

AAC64

Lys K2.6%

AAA96

AAG3

Asp D1.8%

GAU34

GAC33

Glu E2.5%

GAA87

GAG7

Cys C1.0%

UGU22

UGC15

Trp W2.8%

UGA99

UGG8

Arg R1.8%

CGU20

CGC11

CGA35

CGG2

Gly G5.4%

GGU32

GGC54

GGA88

GGG32

Stop 0.3%

UAA5

UAG1

AGA3

AGG2

Genome map

39 annotated features in NC_025553.1

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-loop2

Outer ring: + strand, arrows run clockwise. Inner ring: − strand.
Middle ring: GC% of each gene against the whole genome (37.1%, dashed): out is GC-richer, in is AT-richer (full height = 6 points).

All 39 features as a table

Annotated features of Ichthyomyzon unicuspis (NC_025553.1)
Feature	Type	Start	End	Length	Strand	GC
COX1	Protein-coding gene	1	1,557	1,557 bp	+	39.0%
tRNA-Ser (UCN)	Transfer RNA	1,548	1,619	72 bp	−	–
tRNA-Asp	Transfer RNA	1,620	1,687	68 bp	+	–
COX2	Protein-coding gene	1,691	2,380	690 bp	+	37.3%
tRNA-Lys	Transfer RNA	2,390	2,457	68 bp	+	–
ATP8	Protein-coding gene	2,459	2,626	168 bp	+	37.5%
ATP6	Protein-coding gene	2,617	3,295	679 bp	+	34.2%
COX3	Protein-coding gene	3,296	4,081	786 bp	+	41.7%
tRNA-Gly	Transfer RNA	4,090	4,158	69 bp	+	–
ND3	Protein-coding gene	4,160	4,510	351 bp	+	38.5%
tRNA-Arg	Transfer RNA	4,515	4,580	66 bp	+	–
ND4L	Protein-coding gene	4,589	4,879	291 bp	+	41.2%
ND4	Protein-coding gene	4,873	6,246	1,374 bp	+	34.8%
tRNA-His	Transfer RNA	6,248	6,316	69 bp	+	–
tRNA-Ser (AGY)	Transfer RNA	6,316	6,385	70 bp	+	–
tRNA-Leu (CUN)	Transfer RNA	6,387	6,458	72 bp	+	–
ND5	Protein-coding gene	6,460	8,256	1,797 bp	+	35.1%
ND6	Protein-coding gene	8,241	8,759	519 bp	−	40.3%
D-loop	Control region	8,760	9,359	600 bp	–	34.0%
tRNA-Thr	Transfer RNA	9,360	9,432	73 bp	+	–
tRNA-Glu	Transfer RNA	9,434	9,504	71 bp	−	–
D-loop	Control region	9,505	9,571	67 bp	–	34.0%
CYTB	Protein-coding gene	9,572	10,753	1,182 bp	+	36.7%
tRNA-Pro	Transfer RNA	10,747	10,817	71 bp	−	–
tRNA-Phe	Transfer RNA	10,831	10,898	68 bp	+	–
12S rRNA	Ribosomal RNA	10,899	11,790	892 bp	+	43.7%
tRNA-Val	Transfer RNA	11,791	11,861	71 bp	+	–
16S rRNA	Ribosomal RNA	11,862	13,480	1,619 bp	+	37.0%
tRNA-Leu (UUR)	Transfer RNA	13,481	13,554	74 bp	+	–
ND1	Protein-coding gene	13,559	14,524	966 bp	+	36.2%
tRNA-Ile	Transfer RNA	14,550	14,618	69 bp	+	–
tRNA-Gln	Transfer RNA	14,625	14,695	71 bp	−	–
tRNA-Met	Transfer RNA	14,696	14,763	68 bp	+	–
ND2	Protein-coding gene	14,765	15,806	1,042 bp	+	33.7%
tRNA-Trp	Transfer RNA	15,807	15,874	68 bp	+	–
tRNA-Ala	Transfer RNA	15,877	15,944	68 bp	−	–
tRNA-Asn	Transfer RNA	15,950	16,018	69 bp	−	–
tRNA-Cys	Transfer RNA	16,021	16,086	66 bp	−	–
tRNA-Tyr	Transfer RNA	16,092	16,162	71 bp	−	–