Human vs Lesser hedgehog tenrec LastZ results

Human (Homo sapiens, GRCh38) and Lesser hedgehog tenrec (Echinops telfairi, TENREC) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 76. Human was used as the reference species. After running LastZ, the raw LastZ alignment blocks were chained according to their location in both genomes. During the final netting process, the best sub-chain was chosen in each region on the reference species.

Configuration parameters

ParameterValue
Gap open penalty (O)400
Gap extend penalty (E)30
HSP threshold (K)3000
Threshold for gapped extension (L)3000
Threshold for alignments between gapped alignment blocks (H)2200
Masking count (M)
Seed and Transition value (T)1
Scoring matrix (Q)
Default:
     A    C    G    T
    91 -114  -31 -123
  -114  100 -125  -31
   -31 -125  100 -114
  -123  -31 -114   91

Chunking parameters

ParameterHumanLesser hedgehog tenrec
Chunk size30,000,00010,100,000
Overlap0100,000
Group set size010,100,000
Masking options{default_soft_masking => 1}

Statistics over 1,270,475 alignment blocks

Genome coverage (bp) Coding exon coverage (bp)
Human

Uncovered: 2,410,643,758 out of 3,096,649,726
Covered: 686,005,968 out of 3,096,649,726

Uncovered: 6,491,676 out of 35,228,305
Matches: 23,495,656 out of 35,228,305
Mismatches: 4,877,445 out of 35,228,305
Insertions: 363,528 out of 35,228,305
Identity over aligned base-pairs: 81.8%

Lesser hedgehog tenrec

Uncovered: 3,198,658,805 out of 3,833,584,941
Covered: 634,926,136 out of 3,833,584,941

Uncovered: 5,087,896 out of 25,963,043
Matches: 17,676,525 out of 25,963,043
Mismatches: 3,128,620 out of 25,963,043
Insertions: 70,002 out of 25,963,043
Identity over aligned base-pairs: 84.7%

Block size distribution

Size range All 1,270,475 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
13,038
85.3 kb
10 bp - 100 bp
111,126
6.8 Mb
16,803
1.2 Mb
100 bp - 1 kb
947,886
422.1 Mb
130,691
61.3 Mb
1 kb - 10 kb
198,415
297.0 Mb
125,761
341.1 Mb
10 kb - 100 kb
10
114.2 kb
10,715
271.5 Mb
100 kb - 1 Mb
348
50.9 Mb