putative uncharacterized protein [SARS coronavirus]
Source Data: (From: http://us.expasy.org)
Physical Attributes:
Number of amino acids: 306
Molecular weight: 33845.7
Theoretical pI: 6.22
Amino acid composition:
Ala (A) 17 5.6%
Arg (R) 12 3.9%
Asn (N) 19 6.2%
Asp (D) 17 5.6%
Cys (C) 12 3.9%
Gln (Q) 14 4.6%
Glu (E) 9 2.9%
Gly (G) 26 8.5%
His (H) 8 2.6%
Ile (I) 12 3.9%
Leu (L) 30 9.8%
Lys (K) 11 3.6%
Met (M) 10 3.3%
Phe (F) 16 5.2%
Pro (P) 13 4.2%
Ser (S) 16 5.2%
Thr (T) 26 8.5%
Trp (W) 3 1.0%
Tyr (Y) 11 3.6%
Val (V) 24 7.8%
Asx (B) 0 0.0%
Glx (Z) 0 0.0%
Xaa (X) 0 0.0%
Total number of negatively charged residues (Asp + Glu): 26
Total number of positively charged residues (Arg + Lys): 23
Atomic composition:
Carbon C 1499
Hydrogen H 2325
Nitrogen N 405
Oxygen O 445
Sulfur S 22
Formula: C1499H2325N405O445S22
Total number of atoms: 4696
Extinction coefficients:
Conditions: 6.0 M guanidium hydrochloride
0.02 M phosphate buffer
pH 6.5
Extinction coefficients are in units of M-1 cm-1 .
The first table lists values computed assuming ALL Cys
residues appear as half cystines, whereas the second table
assumes that NONE do.
276 278 279 280 282
nm nm nm nm nm
Ext. coefficient 33020 32962 32495 31870 30720
Abs 0.1% (=1 g/l) 0.976 0.974 0.960 0.942 0.908
276 278 279 280 282
nm nm nm nm nm
Ext. coefficient 32150 32200 31775 31150 30000
Abs 0.1% (=1 g/l) 0.950 0.951 0.939 0.920 0.886
Estimated half-life:
The N-terminal of the sequence considered is S (Ser).
The estimated half-life is: 1.9 hours (mammalian reticulocytes, in vitro).
>20 hours (yeast, in vivo).
>10 hours (Escherichia coli, in vivo).
Instability index:
The instability index (II) is computed to be 29.67
This classifies the protein as stable.
Aliphatic index: 81.83
Grand average of hydropathicity (GRAVY): -0.049
Protein Sequence Feature:
Note: click items to see a description.
Drag two red cursors to select a zoom region.