Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4600
Number of amino acids:436
Molecular Weight:49779.37 Da
Theoretical pI:8.61


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)153.44%
Cysteine CYS (C)132.98%
Glutamic Acid GLU (E)163.67%
Aspartic Acid ASP (D)235.28%
Glycine GLY (G)317.11%
Phynylalanine PHE (F)225.05%
Isoleucine ILE (I)194.36%
Histidine HIS (H)40.92%
Lysine LYS (K)143.21%
Methionine MET (M)112.52%
Leucine LEU (L)429.63%
Asparagine ASN (N)358.03%
Glutamine GLN (Q)92.06%
Proline PRO (P)194.36%
Serine SER (S)4410.09%
Arginine ARG (R)317.11%
Threonine THR (T)296.65%
Tryptophan TRP (W)143.21%
Valine VAL (V)255.73%
Tyrosine TYR (Y)204.59%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC2218
HydrogenH3381
NitrogenN609
OxygenO652
SulphurS24

FormulaC2218H3381N609O652S24
Total Number of Atoms:6884


Total number of positively charged residues (ARG + LYS):45
Total number of negatively charged residues (ASP + GLU):39
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    107550
Absorption 0.1% (=1 g/l)    2.161,   assuming all pairs of CYS residues form cystines

Ext. coefficient    106800
Absorption 0.1% (=1 g/l)    2.145,   assuming all CYS residues are reduced
Aromaticity:0.128

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.22

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.57, 29.59, 19.27]

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:74.633
Grand average of hydropathicity (GRAVY):-0.33