Human vs Hyrax LastZ results

Human (Homo sapiens, GRCh38) and Hyrax (Procavia capensis, proCap1) 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

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

Statistics over 1,691,434 alignment blocks

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

Uncovered: 2,182,686,703 out of 3,096,649,726
Covered: 913,963,023 out of 3,096,649,726

Uncovered: 5,267,082 out of 35,228,305
Matches: 24,974,476 out of 35,228,305
Mismatches: 4,680,313 out of 35,228,305
Insertions: 306,434 out of 35,228,305
Identity over aligned base-pairs: 83.4%

Hyrax

Uncovered: 2,137,179,490 out of 2,993,339,806
Covered: 856,160,316 out of 2,993,339,806

Uncovered: 3,937,644 out of 27,180,283
Matches: 20,048,347 out of 27,180,283
Mismatches: 3,130,368 out of 27,180,283
Insertions: 63,924 out of 27,180,283
Identity over aligned base-pairs: 86.3%

Block size distribution

Size range All 1,691,434 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
29,250
189.4 kb
10 bp - 100 bp
164,094
9.6 Mb
18,425
1.3 Mb
100 bp - 1 kb
1,225,439
533.5 Mb
122,662
53.6 Mb
1 kb - 10 kb
272,622
424.0 Mb
89,792
274.3 Mb
10 kb - 100 kb
29
333.7 kb
20,276
513.8 Mb
100 kb - 1 Mb
820
124.8 Mb