Physicochemical Properties of Peptide



PPepDB ID:PPepDB_6036
Number of amino acids:90
Molecular Weight:9660.43 Da
Theoretical pI:9.26


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)88.89%
Cysteine CYS (C)88.89%
Glutamic Acid GLU (E)33.33%
Aspartic Acid ASP (D)22.22%
Glycine GLY (G)1112.22%
Phynylalanine PHE (F)55.56%
Isoleucine ILE (I)55.56%
Histidine HIS (H)00%
Lysine LYS (K)88.89%
Methionine MET (M)44.44%
Leucine LEU (L)55.56%
Asparagine ASN (N)33.33%
Glutamine GLN (Q)11.11%
Proline PRO (P)44.44%
Serine SER (S)88.89%
Arginine ARG (R)55.56%
Threonine THR (T)11.11%
Tryptophan TRP (W)00%
Valine VAL (V)55.56%
Tyrosine TYR (Y)44.44%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC422
HydrogenH675
NitrogenN117
OxygenO118
SulphurS12

FormulaC422H675N117O118S12
Total Number of Atoms:1344


Total number of positively charged residues (ARG + LYS):13
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    6460
Absorption 0.1% (=1 g/l)    0.669,   assuming all pairs of CYS residues form cystines

Ext. coefficient    5960
Absorption 0.1% (=1 g/l)    0.617,   assuming all CYS residues are reduced
Aromaticity:0.100

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 33.00

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.67, 28.89, 22.22]

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:68.3334
Grand average of hydropathicity (GRAVY):0.11