Physicochemical Properties of Peptide



PPepDB ID:PPepDB_3484
Number of amino acids:75
Molecular Weight:8402.94 Da
Theoretical pI:8.99


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)22.67%
Cysteine CYS (C)912%
Glutamic Acid GLU (E)34%
Aspartic Acid ASP (D)34%
Glycine GLY (G)79.33%
Phynylalanine PHE (F)56.67%
Isoleucine ILE (I)00%
Histidine HIS (H)22.67%
Lysine LYS (K)56.67%
Methionine MET (M)34%
Leucine LEU (L)912%
Asparagine ASN (N)22.67%
Glutamine GLN (Q)00%
Proline PRO (P)11.33%
Serine SER (S)56.67%
Arginine ARG (R)79.33%
Threonine THR (T)68%
Tryptophan TRP (W)00%
Valine VAL (V)56.67%
Tyrosine TYR (Y)11.33%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC358
HydrogenH583
NitrogenN107
OxygenO102
SulphurS12

FormulaC358H583N107O102S12
Total Number of Atoms:1162


Total number of positively charged residues (ARG + LYS):12
Total number of negatively charged residues (ASP + GLU):6
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    1990
Absorption 0.1% (=1 g/l)    0.237,   assuming all pairs of CYS residues form cystines

Ext. coefficient    1490
Absorption 0.1% (=1 g/l)    0.177,   assuming all CYS residues are reduced
Aromaticity:0.080

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.00

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.67, 20.00, 22.67]

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:68.8
Grand average of hydropathicity (GRAVY):0.02