Name: putative small envelope protein E [SARS coronavirus] Source Data:
(From: http://us.expasy.org)

Physical Attributes:

 

Molecular weight: 8361.0

Theoretical pI: 6.01

Amino acid composition:

Ala (A)   4	  5.3%
Arg (R)   2	  2.6%
Asn (N)   5	  6.6%
Asp (D)   1	  1.3%
Cys (C)   3	  3.9%
Gln (Q)   0	  0.0%
Glu (E)   3	  3.9%
Gly (G)   2	  2.6%
His (H)   0	  0.0%
Ile (I)   3	  3.9%
Leu (L)  14	 18.4%
Lys (K)   2	  2.6%
Met (M)   1	  1.3%
Phe (F)   4	  5.3%
Pro (P)   2	  2.6%
Ser (S)   7	  9.2%
Thr (T)   5	  6.6%
Trp (W)   0	  0.0%
Tyr (Y)   4	  5.3%
Val (V)  14	 18.4%

Asx (B)   0	  0.0%
Glx (Z)   0	  0.0%
Xaa (X)   0	  0.0%

Total number of negatively charged residues (Asp + Glu): 4
Total number of positively charged residues (Arg + Lys): 4

Atomic composition:

Carbon      C	       388
Hydrogen    H	       625
Nitrogen    N	        89
Oxygen      O	       106
Sulfur      S	         4

Formula: C388H625N89O106S4
Total number of atoms: 1212

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     5945    5727    5500    5240    4920
Abs 0.1% (=1 g/l)   0.711   0.685   0.658   0.627   0.588



                      276     278     279     280     282
                       nm      nm      nm      nm      nm
Ext. coefficient     5800    5600    5380    5120    4800
Abs 0.1% (=1 g/l)   0.694   0.670   0.643   0.612   0.574


Estimated half-life:

The N-terminal of the sequence considered is M (Met).

The estimated half-life is: 30 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 30.48
This classifies the protein as stable.



Aliphatic index: 145.92

Grand average of hydropathicity (GRAVY): 1.141 
 
            

Protein Sequence Feature:
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2003-4-26