Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1094
Number of amino acids:135
Molecular Weight:14734.83 Da
Theoretical pI:6.04


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)96.67%
Cysteine CYS (C)1410.37%
Glutamic Acid GLU (E)107.41%
Aspartic Acid ASP (D)64.44%
Glycine GLY (G)75.19%
Phynylalanine PHE (F)53.7%
Isoleucine ILE (I)75.19%
Histidine HIS (H)64.44%
Lysine LYS (K)85.93%
Methionine MET (M)21.48%
Leucine LEU (L)85.93%
Asparagine ASN (N)85.93%
Glutamine GLN (Q)21.48%
Proline PRO (P)42.96%
Serine SER (S)128.89%
Arginine ARG (R)53.7%
Threonine THR (T)85.93%
Tryptophan TRP (W)00%
Valine VAL (V)128.89%
Tyrosine TYR (Y)21.48%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC624
HydrogenH998
NitrogenN180
OxygenO200
SulphurS16

FormulaC624H998N180O200S16
Total Number of Atoms:2018


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):16
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    3855
Absorption 0.1% (=1 g/l)    0.262,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.202,   assuming all CYS residues are reduced
Aromaticity:0.052

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.31

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.19, 22.96, 21.48]

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:75.7778
Grand average of hydropathicity (GRAVY):-0.07