Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4704
Number of amino acids:120
Molecular Weight:11816.89 Da
Theoretical pI:9.26


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1613.33%
Cysteine CYS (C)97.5%
Glutamic Acid GLU (E)00%
Aspartic Acid ASP (D)10.83%
Glycine GLY (G)1411.67%
Phynylalanine PHE (F)10.83%
Isoleucine ILE (I)75.83%
Histidine HIS (H)00%
Lysine LYS (K)65%
Methionine MET (M)32.5%
Leucine LEU (L)97.5%
Asparagine ASN (N)65%
Glutamine GLN (Q)43.33%
Proline PRO (P)86.67%
Serine SER (S)1310.83%
Arginine ARG (R)32.5%
Threonine THR (T)75.83%
Tryptophan TRP (W)00%
Valine VAL (V)119.17%
Tyrosine TYR (Y)21.67%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC505
HydrogenH849
NitrogenN145
OxygenO155
SulphurS12

FormulaC505H849N145O155S12
Total Number of Atoms:1666


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):1
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    3480
Absorption 0.1% (=1 g/l)    0.294,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.252,   assuming all CYS residues are reduced
Aromaticity:0.025

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 35.85

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[25.00, 34.17, 23.33]

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:91.9166
Grand average of hydropathicity (GRAVY):0.50