Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4206
Number of amino acids:130
Molecular Weight:13559.81 Da
Theoretical pI:11.75


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)2317.69%
Cysteine CYS (C)53.85%
Glutamic Acid GLU (E)10.77%
Aspartic Acid ASP (D)43.08%
Glycine GLY (G)86.15%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)10.77%
Histidine HIS (H)43.08%
Lysine LYS (K)53.85%
Methionine MET (M)21.54%
Leucine LEU (L)1511.54%
Asparagine ASN (N)00%
Glutamine GLN (Q)43.08%
Proline PRO (P)129.23%
Serine SER (S)129.23%
Arginine ARG (R)1713.08%
Threonine THR (T)107.69%
Tryptophan TRP (W)00%
Valine VAL (V)75.38%
Tyrosine TYR (Y)00%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC574
HydrogenH988
NitrogenN198
OxygenO167
SulphurS7

FormulaC574H988N198O167S7
Total Number of Atoms:1934


Total number of positively charged residues (ARG + LYS):22
Total number of negatively charged residues (ASP + GLU):5
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    250
Absorption 0.1% (=1 g/l)    0.018,   assuming all pairs of CYS residues form cystines

Ext. coefficient    0
Absorption 0.1% (=1 g/l)    0.000,   assuming all CYS residues are reduced
Aromaticity:0.000

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 70.72

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[17.69, 24.62, 31.54]

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:81.3078
Grand average of hydropathicity (GRAVY):-0.24