Physicochemical Properties of Peptide



PPepDB ID:PPepDB_705
Number of amino acids:41
Molecular Weight:4186.78 Da
Theoretical pI:8.42


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)512.2%
Cysteine CYS (C)1024.39%
Glutamic Acid GLU (E)12.44%
Aspartic Acid ASP (D)00%
Glycine GLY (G)717.07%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)12.44%
Histidine HIS (H)00%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)12.44%
Asparagine ASN (N)24.88%
Glutamine GLN (Q)12.44%
Proline PRO (P)24.88%
Serine SER (S)37.32%
Arginine ARG (R)49.76%
Threonine THR (T)12.44%
Tryptophan TRP (W)00%
Valine VAL (V)00%
Tyrosine TYR (Y)37.32%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC163
HydrogenH258
NitrogenN56
OxygenO54
SulphurS10

FormulaC163H258N56O54S10
Total Number of Atoms:541


Total number of positively charged residues (ARG + LYS):4
Total number of negatively charged residues (ASP + GLU):1
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    5095
Absorption 0.1% (=1 g/l)    1.217,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    1.068,   assuming all CYS residues are reduced
Aromaticity:0.073

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 3.37

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[12.20, 34.15, 17.07]

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:31.2195
Grand average of hydropathicity (GRAVY):-0.07