Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5770
Number of amino acids:78
Molecular Weight:8392.02 Da
Theoretical pI:7.71


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)67.69%
Cysteine CYS (C)810.26%
Glutamic Acid GLU (E)22.56%
Aspartic Acid ASP (D)33.85%
Glycine GLY (G)78.97%
Phynylalanine PHE (F)45.13%
Isoleucine ILE (I)1114.1%
Histidine HIS (H)22.56%
Lysine LYS (K)45.13%
Methionine MET (M)33.85%
Leucine LEU (L)45.13%
Asparagine ASN (N)22.56%
Glutamine GLN (Q)22.56%
Proline PRO (P)78.97%
Serine SER (S)45.13%
Arginine ARG (R)22.56%
Threonine THR (T)33.85%
Tryptophan TRP (W)00%
Valine VAL (V)22.56%
Tyrosine TYR (Y)22.56%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC372
HydrogenH590
NitrogenN96
OxygenO102
SulphurS11

FormulaC372H590N96O102S11
Total Number of Atoms:1171


Total number of positively charged residues (ARG + LYS):6
Total number of negatively charged residues (ASP + GLU):5
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)    0.415,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.355,   assuming all CYS residues are reduced
Aromaticity:0.077

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.93

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.49, 25.64, 19.23]

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:90.1284
Grand average of hydropathicity (GRAVY):0.47