Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2251
Number of amino acids:86
Molecular Weight:9682.66 Da
Theoretical pI:9.32


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)22.33%
Cysteine CYS (C)89.3%
Glutamic Acid GLU (E)44.65%
Aspartic Acid ASP (D)11.16%
Glycine GLY (G)66.98%
Phynylalanine PHE (F)55.81%
Isoleucine ILE (I)33.49%
Histidine HIS (H)00%
Lysine LYS (K)89.3%
Methionine MET (M)44.65%
Leucine LEU (L)1011.63%
Asparagine ASN (N)44.65%
Glutamine GLN (Q)33.49%
Proline PRO (P)44.65%
Serine SER (S)78.14%
Arginine ARG (R)55.81%
Threonine THR (T)33.49%
Tryptophan TRP (W)11.16%
Valine VAL (V)78.14%
Tyrosine TYR (Y)11.16%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC426
HydrogenH697
NitrogenN117
OxygenO115
SulphurS12

FormulaC426H697N117O115S12
Total Number of Atoms:1367


Total number of positively charged residues (ARG + LYS):13
Total number of negatively charged residues (ASP + GLU):5
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    7490
Absorption 0.1% (=1 g/l)    0.774,   assuming all pairs of CYS residues form cystines

Ext. coefficient    6990
Absorption 0.1% (=1 g/l)    0.722,   assuming all CYS residues are reduced
Aromaticity:0.081

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.96

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.40, 24.42, 23.26]

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:84.8837
Grand average of hydropathicity (GRAVY):0.14