Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1606
Number of amino acids:27
Molecular Weight:2925.28 Da
Theoretical pI:8.53


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)13.7%
Cysteine CYS (C)414.81%
Glutamic Acid GLU (E)13.7%
Aspartic Acid ASP (D)00%
Glycine GLY (G)311.11%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)13.7%
Histidine HIS (H)00%
Lysine LYS (K)27.41%
Methionine MET (M)00%
Leucine LEU (L)13.7%
Asparagine ASN (N)518.52%
Glutamine GLN (Q)27.41%
Proline PRO (P)13.7%
Serine SER (S)27.41%
Arginine ARG (R)13.7%
Threonine THR (T)13.7%
Tryptophan TRP (W)13.7%
Valine VAL (V)13.7%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC117
HydrogenH190
NitrogenN40
OxygenO40
SulphurS4

FormulaC117H190N40O40S4
Total Number of Atoms:391


Total number of positively charged residues (ARG + LYS):3
Total number of negatively charged residues (ASP + GLU):1
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    5750
Absorption 0.1% (=1 g/l)    1.966,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    1.880,   assuming all CYS residues are reduced
Aromaticity:0.037

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 19.59

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[14.81, 40.74, 11.11]

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:43.3333
Grand average of hydropathicity (GRAVY):-0.81