Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3884
Number of amino acids:93
Molecular Weight:9243.62 Da
Theoretical pI:8.7


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1516.13%
Cysteine CYS (C)88.6%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)33.23%
Glycine GLY (G)99.68%
Phynylalanine PHE (F)11.08%
Isoleucine ILE (I)55.38%
Histidine HIS (H)00%
Lysine LYS (K)66.45%
Methionine MET (M)00%
Leucine LEU (L)77.53%
Asparagine ASN (N)1010.75%
Glutamine GLN (Q)11.08%
Proline PRO (P)77.53%
Serine SER (S)33.23%
Arginine ARG (R)11.08%
Threonine THR (T)1111.83%
Tryptophan TRP (W)00%
Valine VAL (V)44.3%
Tyrosine TYR (Y)22.15%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC393
HydrogenH647
NitrogenN113
OxygenO127
SulphurS8

FormulaC393H647N113O127S8
Total Number of Atoms:1288


Total number of positively charged residues (ARG + LYS):7
Total number of negatively charged residues (ASP + GLU):3
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    3480
Absorption 0.1% (=1 g/l)    0.376,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.322,   assuming all CYS residues are reduced
Aromaticity:0.032

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.95

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[20.43, 31.18, 23.66]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:78.9247
Grand average of hydropathicity (GRAVY):0.12