Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5923
Number of amino acids:99
Molecular Weight:10704.61 Da
Theoretical pI:8.88


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)66.06%
Cysteine CYS (C)1313.13%
Glutamic Acid GLU (E)33.03%
Aspartic Acid ASP (D)22.02%
Glycine GLY (G)99.09%
Phynylalanine PHE (F)33.03%
Isoleucine ILE (I)44.04%
Histidine HIS (H)44.04%
Lysine LYS (K)44.04%
Methionine MET (M)11.01%
Leucine LEU (L)1111.11%
Asparagine ASN (N)44.04%
Glutamine GLN (Q)11.01%
Proline PRO (P)55.05%
Serine SER (S)77.07%
Arginine ARG (R)88.08%
Threonine THR (T)66.06%
Tryptophan TRP (W)00%
Valine VAL (V)66.06%
Tyrosine TYR (Y)22.02%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC455
HydrogenH744
NitrogenN140
OxygenO130
SulphurS14

FormulaC455H744N140O130S14
Total Number of Atoms:1483


Total number of positively charged residues (ARG + LYS):12
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    3730
Absorption 0.1% (=1 g/l)    0.348,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.278,   assuming all CYS residues are reduced
Aromaticity:0.051

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.58

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[26.26, 25.25, 21.21]

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:82.7272
Grand average of hydropathicity (GRAVY):0.15