Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5992
Number of amino acids:113
Molecular Weight:11877.87 Da
Theoretical pI:7.64


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)87.08%
Cysteine CYS (C)108.85%
Glutamic Acid GLU (E)21.77%
Aspartic Acid ASP (D)54.42%
Glycine GLY (G)87.08%
Phynylalanine PHE (F)10.88%
Isoleucine ILE (I)54.42%
Histidine HIS (H)10.88%
Lysine LYS (K)43.54%
Methionine MET (M)10.88%
Leucine LEU (L)1614.16%
Asparagine ASN (N)32.65%
Glutamine GLN (Q)65.31%
Proline PRO (P)76.19%
Serine SER (S)119.73%
Arginine ARG (R)43.54%
Threonine THR (T)97.96%
Tryptophan TRP (W)00%
Valine VAL (V)97.96%
Tyrosine TYR (Y)32.65%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC512
HydrogenH848
NitrogenN140
OxygenO160
SulphurS11

FormulaC512H848N140O160S11
Total Number of Atoms:1671


Total number of positively charged residues (ARG + LYS):8
Total number of negatively charged residues (ASP + GLU):7
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    5095
Absorption 0.1% (=1 g/l)    0.429,   assuming all pairs of CYS residues form cystines

Ext. coefficient    4470
Absorption 0.1% (=1 g/l)    0.376,   assuming all CYS residues are reduced
Aromaticity:0.035

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.02

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[30.09, 25.66, 23.89]

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:102.655
Grand average of hydropathicity (GRAVY):0.34