MitoAge

Blarina brevicauda

Northern short-tailed shrew

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Maximum lifespan
2.2 yr
AnAge record
mtDNA size
16,919 bp
RefSeq NC_042734.1
GC content
39.44%
Whole genome
Non-coding
1,518 bp
D-loop 1,447 bp

Where Northern short-tailed shrew sits among 2,335 species

Whole-genome GC content against maximum lifespan. Northern short-tailed shrew has the 2,249th longest lifespan of them.

10203040501 yr10 yr100 yrMaximum lifespan, log scaleGC %Northern short-tailed shrew
  • This species
  • Other mammals
  • Other classes
Plot other mtDNA features with this species highlighted

Base composition

Whole genome16,919 bp
GC skew (G − C) / (G + C)
−0.318
AT skew (A − T) / (A + T)
+0.068

Life history

Maximum lifespan
2.2 years
Adult weight
21.6 g
Birth weight
1.3 g
Basal metabolic rate
0.344 W
Female sexual maturity
46 days
Male sexual maturity
65 days
Gestation or incubation
17 days
Litter or clutch size
6
Litters per year
3
Postnatal growth rate
0.188 per day

Lifespan from AnAge · AnAge record · other traits from AnAge build 15 (HAGRID 03211)

About this record

Lifespan source
AnAge build 15
Based on
an animal in captivity
Data quality
acceptable, small sample
Licence
Free to use, subject to the Human Ageing Genomic Resources conditions of use
Status
New in build 2
In the database since
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 genome16,919 bp
Protein-coding11,349 bp
12S rRNA963 bp
16S rRNA1,577 bp
All tRNA1,512 bp
D-loop1,447 bp

Genes and regions

Select a column to sort; select a gene to compare it across species
Composition
ND1NADH dehydrogenase subunit 1956 bp30.3%29.6%12.3%27.7%40.06%−0.384+0.012
ND2NADH dehydrogenase subunit 21,042 bp36.3%26.8%9.0%27.9%36.95%−0.512+0.151
COX1Cytochrome c oxidase subunit I1,545 bp26.7%30.0%16.8%26.4%43.24%−0.222−0.058
COX2Cytochrome c oxidase subunit II684 bp33.3%26.6%13.0%27.0%40.06%−0.350+0.112
ATP8ATP synthase F0 subunit 8204 bp39.7%29.9%6.9%23.5%30.39%−0.548+0.141
ATP6ATP synthase F0 subunit 6681 bp28.6%30.1%11.7%29.5%41.26%−0.431−0.025
COX3Cytochrome c oxidase subunit III784 bp27.4%29.0%15.2%28.4%43.62%−0.304−0.027
ND3NADH dehydrogenase subunit 3348 bp32.8%27.6%12.1%27.6%39.66%−0.391+0.086
ND4LNADH dehydrogenase subunit 4L297 bp26.3%32.3%15.8%25.6%41.41%−0.236−0.103
ND4NADH dehydrogenase subunit 41,378 bp32.7%28.1%10.2%29.0%39.19%−0.478+0.076
ND5NADH dehydrogenase subunit 51,821 bp31.0%29.8%11.1%28.1%39.26%−0.432+0.020
ND6NADH dehydrogenase subunit 6537 bp41.5%23.1%7.6%27.7%35.38%−0.568+0.285
CYTBCytochrome b1,140 bp27.7%28.9%14.4%29.0%43.42%−0.337−0.020
12S rRNA12S ribosomal RNA963 bp35.4%24.9%18.5%21.2%39.67%−0.068+0.174
16S rRNA16S ribosomal RNA1,577 bp35.0%26.3%17.5%21.2%38.74%−0.097+0.143
D-loopControl region (D-loop)1,447 bp34.3%28.8%11.5%25.3%36.84%−0.373+0.088

Codon usage

Counts per codon, darker is more frequent

3,804 codons in all protein-coding genes. Grouped with the Vertebrate mitochondrial code (NCBI table 2).

Phe F6.3%
UUU106
UUC133
Leu L15.8%
UUA132
UUG17
CUU85
CUC104
CUA226
CUG38
Ile I8.9%
AUU196
AUC142
Met M5.9%
AUA181
AUG45
Val V5.2%
GUU44
GUC63
GUA73
GUG17
Ser S7.6%
UCU46
UCC62
UCA119
UCG10
AGU14
AGC40
Pro P5.0%
CCU41
CCC61
CCA77
CCG10
Thr T8.1%
ACU65
ACC90
ACA147
ACG7
Ala A6.5%
GCU53
GCC113
GCA74
GCG8
Tyr Y3.7%
UAU66
UAC74
His H2.5%
CAU22
CAC73
Gln Q2.4%
CAA85
CAG7
Asn N4.2%
AAU61
AAC99
Lys K2.5%
AAA85
AAG12
Asp D1.8%
GAU21
GAC48
Glu E2.5%
GAA74
GAG23
Cys C0.7%
UGU8
UGC17
Trp W2.7%
UGA91
UGG12
Arg R1.7%
CGU6
CGC14
CGA39
CGG4
Gly G5.7%
GGU33
GGC68
GGA91
GGG23
Stop 0.2%
UAA8
UAG0
AGA1
AGG0

Genome map

38 annotated features in NC_042734.1

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 (39.4%, dashed): out is GC-richer, in is AT-richer (full height = 6 points).
All 38 features as a table
FeatureTypeStartEndLengthStrandGC
tRNA-PheTransfer RNA17171 bp+–
12S rRNARibosomal RNA741,036963 bp+39.7%
tRNA-ValTransfer RNA1,0371,10367 bp+–
16S rRNARibosomal RNA1,1042,6801,577 bp+38.7%
tRNA-Leu (UUR)Transfer RNA2,6812,75575 bp+–
ND1Protein-coding gene2,7583,713956 bp+40.1%
tRNA-IleTransfer RNA3,7143,78168 bp+–
tRNA-GlnTransfer RNA3,7793,85173 bp−–
tRNA-MetTransfer RNA3,8523,92069 bp+–
ND2Protein-coding gene3,9214,9621,042 bp+37.0%
tRNA-TrpTransfer RNA4,9635,03068 bp+–
tRNA-AlaTransfer RNA5,0355,10369 bp−–
tRNA-AsnTransfer RNA5,1065,17873 bp−–
tRNA-CysTransfer RNA5,2195,28567 bp−–
tRNA-TyrTransfer RNA5,2875,35569 bp−–
COX1Protein-coding gene5,3576,9011,545 bp+43.2%
tRNA-Ser (UCN)Transfer RNA6,9076,97771 bp+–
tRNA-AspTransfer RNA6,9827,04968 bp+–
COX2Protein-coding gene7,0507,733684 bp+40.1%
tRNA-LysTransfer RNA7,7377,80468 bp+–
ATP8Protein-coding gene7,8068,009204 bp+30.4%
ATP6Protein-coding gene7,9678,647681 bp+41.3%
COX3Protein-coding gene8,6479,430784 bp+43.6%
tRNA-GlyTransfer RNA9,4319,50070 bp+–
ND3Protein-coding gene9,5019,848348 bp+39.7%
tRNA-ArgTransfer RNA9,8499,91567 bp+–
ND4LProtein-coding gene9,91710,213297 bp+41.4%
ND4Protein-coding gene10,20711,5841,378 bp+39.2%
tRNA-HisTransfer RNA11,58511,65369 bp+–
tRNA-Ser (AGY)Transfer RNA11,65411,71259 bp+–
tRNA-Leu (CUN)Transfer RNA11,71411,78370 bp+–
ND5Protein-coding gene11,78413,6041,821 bp+39.3%
ND6Protein-coding gene13,58814,124537 bp−35.4%
tRNA-GluTransfer RNA14,12514,19369 bp−–
CYTBProtein-coding gene14,19815,3371,140 bp+43.4%
tRNA-ThrTransfer RNA15,33815,40568 bp+–
tRNA-ProTransfer RNA15,40615,47267 bp−–
D-loopControl region15,47316,9191,447 bp–36.8%

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