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UniProtKB/Swiss-Prot P00966: Variant p.Tyr190Asp

Argininosuccinate synthase
Gene: ASS1
Variant information

Variant position:  190
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  LP/P [Disclaimer]
The variants are classified into three categories: LP/P, LB/B and US.
  • LP/P: likely pathogenic or pathogenic.
  • LB/B: likely benign or benign.
  • US: uncertain significance

Residue change:  From Tyrosine (Y) to Aspartate (D) at position 190 (Y190D, p.Tyr190Asp).
Indicates the amino acid change of the variant. The one-letter and three-letter codes for amino acids used in UniProtKB/Swiss-Prot are those adopted by the commission on Biochemical Nomenclature of the IUPAC-IUB.

Physico-chemical properties:  Change from large size and aromatic (Y) to medium size and acidic (D)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -3
The score within a Blosum matrix for the corresponding wild-type to variant amino acid change. The log-odds score measures the logarithm for the ratio of the likelihood of two amino acids appearing by chance. The Blosum62 substitution matrix is used. This substitution matrix contains scores for all possible exchanges of one amino acid with another:
  • Lowest score: -4 (low probability of substitution).
  • Highest score: 11 (high probability of substitution).
More information can be found on the following page

Variant description:  In CTLN1.
Any additional useful information about the variant.



Sequence information

Variant position:  190
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  412
The length of the canonical sequence.

Location on the sequence:   PIPVTPKNPWSMDENLMHIS  Y EAGILENPKNQAPPGLYTKT
The residue change on the sequence. Unless the variant is located at the beginning or at the end of the protein sequence, both residues upstream (20) and downstream (20) of the variant will be shown.

Residue conservation: 
The multiple alignment of the region surrounding the variant against various orthologous sequences.

Human                         PIPVTPKNPWSMDENLMHISYEAGILENPKNQAPPGLYTKT

Mouse                         PIPVTPKSPWSMDENLMHISYEAGILENPKNQAPPGLYTKT

Rat                           PIPVTPKSPWSMDENLMHISYEAGILENPKNQAPPGLYTKT

Bovine                        PVPVTPKNPWSMDENLMHISYEAGILENPKNQAPPGLYTKT

Chicken                       PVPVTPKAPWSMDENLMHISYEAGILENPKNRAPLDLYTKT

Xenopus laevis                SVPVTPKSPWSMDENLMHISYEGGILENPKNHAPPGLYLKT

Xenopus tropicalis            PVPVTPKDPWSMDENIMHISYEGGILENPKNHAPPGLYLKT

Zebrafish                     PVPVTPKAPWSMDANLMHISYESGILENPKNHAPSDLYQMT

Drosophila                    EVSAKPATPWSTDANILHISYESGILEDPNTVAPENLYEMT

Baker's yeast                 PVAQTKAKPWSTDENQAHISYEAGILEDPDTTPPKDMWKLI

Fission yeast                 PVTQTTKKPWSMDENIVHCSYEAGILEDPSMTPPKDMWKLT

Sequence annotation in neighborhood:  
The regions or sites of interest surrounding the variant. In general the features listed are posttranslational modifications, binding sites, enzyme active sites, local secondary structure or other characteristics reported in the cited references. The "Sequence annotation in neighborhood" lines have a fixed format:
  • Type: the type of sequence feature.
  • Positions: endpoints of the sequence feature.
  • Description: contains additional information about the feature.

TypePositionsDescription
Chain 1 – 412 Argininosuccinate synthase
Binding site 180 – 180 Citrulline
Binding site 189 – 189 Citrulline
Modified residue 176 – 176 N6-acetyllysine; by CLOCK
Modified residue 180 – 180 Phosphoserine
Mutagenesis 176 – 176 K -> QR. Significant loss of acetylation but no decrease in enzyme activity; when associated with Q-165 or R-165.
Beta strand 188 – 190


Literature citations

Mild citrullinemia in Caucasians is an allelic variant of argininosuccinate synthetase deficiency (citrullinemia type 1).
Haeberle J.; Pauli S.; Schmidt E.; Schulze-Eilfing B.; Berning C.; Koch H.G.;
Mol. Genet. Metab. 80:302-306(2003)
Cited for: VARIANTS CTLN1 SER-14; LEU-40; GLN-127; ARG-179; ASP-190; GLU-202; MET-263; MET-269; SER-324; GLY-345 AND VAL-362;

Mutations in the human argininosuccinate synthetase (ASS1) gene, impact on patients, common changes, and structural considerations.
Diez-Fernandez C.; Ruefenacht V.; Haeberle J.;
Hum. Mutat. 38:471-484(2017)
Cited for: VARIANTS CTLN1 27-GLN--LYS-412 DEL; ILE-64; PRO-79; 97-CYS--LYS-412 DEL; CYS-100; HIS-100; ASP-111; CYS-117; 138-GLN--LYS-412 DEL; SER-157; PRO-160; 163-TYR--LYS-412 DEL; PRO-164; LYS-184; ASP-190; PRO-206; ARG-230; ILE-237; PRO-258; VAL-258; CYS-265; 275-GLY--LYS-412 DEL; THR-277; 279-ARG--LYS-412 DEL; ILE-284; PRO-290; SER-291; GLY-296; ASP-299; VAL-302; GLY-306; CYS-307; 311-GLN--LYS-412 DEL; MET-321; SER-324; VAL-324; HIS-335; PHE-341; 344-ARG--LYS-412 DEL; ARG-347; VAL-356; 357-GLN--LYS-412 DEL; ASP-359; 380-GLN--LYS-412 DEL AND PRO-389;

Disclaimer: Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. They are not in any way intended to be used as a substitute for professional medical advice, diagnostic, treatment or care.