Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1465
Number of amino acids:36
Molecular Weight:3948.5 Da
Theoretical pI:9.35


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)25.56%
Cysteine CYS (C)513.89%
Glutamic Acid GLU (E)12.78%
Aspartic Acid ASP (D)00%
Glycine GLY (G)411.11%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)12.78%
Histidine HIS (H)12.78%
Lysine LYS (K)38.33%
Methionine MET (M)00%
Leucine LEU (L)25.56%
Asparagine ASN (N)411.11%
Glutamine GLN (Q)38.33%
Proline PRO (P)12.78%
Serine SER (S)38.33%
Arginine ARG (R)38.33%
Threonine THR (T)12.78%
Tryptophan TRP (W)12.78%
Valine VAL (V)12.78%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC159
HydrogenH264
NitrogenN58
OxygenO50
SulphurS5

FormulaC159H264N58O50S5
Total Number of Atoms:536


Total number of positively charged residues (ARG + LYS):6
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)    1.456,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5500
Absorption 0.1% (=1 g/l)    1.393,   assuming all CYS residues are reduced
Aromaticity:0.028

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 26.62

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[13.89, 33.33, 13.89]

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:46.1111
Grand average of hydropathicity (GRAVY):-0.87