Human vs Gorilla LastZ results

Human (Homo sapiens, GRCh38) and Gorilla (Gorilla gorilla gorilla, gorGor4) were aligned using the LastZ alignment algorithm (LastZ) in Ensembl release 91. 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)5000
Threshold for gapped extension (L)5000
Threshold for alignments between gapped alignment blocks (H)3000
Masking count (M)10
Seed and Transition value (T)1
Scoring matrix (Q)
Primate:
    A    C    G    T
   90 -330 -236 -356
 -330  100 -318 -236
 -236 -318  100 -330
 -356 -236 -330   90

Chunking parameters

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

Statistics over 246,331 alignment blocks

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

Uncovered: 296,293,426 out of 3,096,649,726
Covered: 2,800,356,300 out of 3,096,649,726

Uncovered: 197,107 out of 35,437,039
Matches: 33,972,278 out of 35,437,039
Mismatches: 1,245,186 out of 35,437,039
Insertions: 22,468 out of 35,437,039
Identity over aligned base-pairs: 96.4%

Gorilla

Uncovered: 339,747,128 out of 3,063,362,794
Covered: 2,723,615,666 out of 3,063,362,794

Uncovered: 560,988 out of 34,568,170
Matches: 33,644,683 out of 34,568,170
Mismatches: 345,213 out of 34,568,170
Insertions: 17,286 out of 34,568,170
Identity over aligned base-pairs: 98.9%

Block size distribution

Size range All 246,331 alignment blocks Blocks grouped in nets
# blocks Total size (incl. gaps) # nets Total size (incl. gaps)
1 bp - 10 bp
2,437
13.4 kb
10 bp - 100 bp
19,480
1.0 Mb
6,782
386.6 kb
100 bp - 1 kb
50,942
20.7 Mb
15,915
5.4 Mb
1 kb - 10 kb
89,653
393.3 Mb
10,355
34.0 Mb
10 kb - 100 kb
82,772
2.3 Gb
1,957
47.4 Mb
100 kb - 1 Mb
1,047
129.2 Mb
155
28.5 Mb
1 Mb - 10 Mb
3
5.3 Mb
10 Mb - 100 Mb
27
1.5 Gb
100 Mb - 1 Gb
8
1.2 Gb