Human vs Tree Shrew LastZ results

Human (Homo sapiens, GRCh38) and Tree Shrew (Tupaia belangeri, TREESHREW) 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

ParameterHumanTree Shrew
Chunk size30,000,00010,100,000
Overlap0100,000
Group set size010,100,000
Masking options{default_soft_masking => 1}

Statistics over 2,023,756 alignment blocks

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

Uncovered: 2,031,862,685 out of 3,096,649,726
Covered: 1,064,787,041 out of 3,096,649,726

Uncovered: 6,730,824 out of 35,228,305
Matches: 24,172,211 out of 35,228,305
Mismatches: 4,029,817 out of 35,228,305
Insertions: 295,453 out of 35,228,305
Identity over aligned base-pairs: 84.8%

Tree Shrew

Uncovered: 2,678,156,003 out of 3,670,341,392
Covered: 992,185,389 out of 3,670,341,392

Uncovered: 4,697,417 out of 24,459,053
Matches: 17,468,359 out of 24,459,053
Mismatches: 2,250,085 out of 24,459,053
Insertions: 43,192 out of 24,459,053
Identity over aligned base-pairs: 88.4%

Block size distribution

Size range All 2,023,756 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
48,822
318.4 kb
10 bp - 100 bp
226,362
12.9 Mb
23,672
1.6 Mb
100 bp - 1 kb
1,437,634
610.8 Mb
126,307
53.9 Mb
1 kb - 10 kb
310,908
489.0 Mb
62,882
165.3 Mb
10 kb - 100 kb
30
349.0 kb
11,790
415.6 Mb
100 kb - 1 Mb
2,440
474.9 Mb
1 Mb - 10 Mb
2
2.1 Mb